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Finding the Fourth Proportional to 90,635.70, 135,953.55 and 89,979.60

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Solution

The fourth proportional to 90,635.70, 135,953.55 and 89,979.60 is: 134,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,635.70 : 135,953.55 = 89,979.60 : x
  2. Step 2: Convert to fraction form
    90,635.70/135,953.55 = 89,979.60/x
  3. Step 3: Cross multiply
    90,635.70x = 135,953.55 × 89,979.60
  4. Step 4: Simplify right side
    90,635.70x = 12,233,046,047.58
  5. Step 5: Solve for x
    x = 12,233,046,047.58/90,635.70
  6. Step 6: Final answer
    x = 134,969.40

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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.