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Finding the Fourth Proportional to 90,700.11, 135,979.11 and 57,350.25

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Solution

The fourth proportional to 90,700.11, 135,979.11 and 57,350.25 is: 85,980.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,700.11 : 135,979.11 = 57,350.25 : x
  2. Step 2: Convert to fraction form
    90,700.11/135,979.11 = 57,350.25/x
  3. Step 3: Cross multiply
    90,700.11x = 135,979.11 × 57,350.25
  4. Step 4: Simplify right side
    90,700.11x = 7,798,435,953.28
  5. Step 5: Solve for x
    x = 7,798,435,953.28/90,700.11
  6. Step 6: Final answer
    x = 85,980.45

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Half scale
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Double scale
Find fourth proportional to 90,701.11, 135,980.61 and 57,351.25
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.