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Finding the Fourth Proportional to 85,551.20, 128,240.40 and 38,837.60

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Solution

The fourth proportional to 85,551.20, 128,240.40 and 38,837.60 is: 58,217.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551.20 : 128,240.40 = 38,837.60 : x
  2. Step 2: Convert to fraction form
    85,551.20/128,240.40 = 38,837.60/x
  3. Step 3: Cross multiply
    85,551.20x = 128,240.40 × 38,837.60
  4. Step 4: Simplify right side
    85,551.20x = 4,980,549,359.04
  5. Step 5: Solve for x
    x = 4,980,549,359.04/85,551.20
  6. Step 6: Final answer
    x = 58,217.18

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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.