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Finding the Fourth Proportional to 71,508.47, 98,681.71 and 39,677.60

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Solution

The fourth proportional to 71,508.47, 98,681.71 and 39,677.60 is: 54,755.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,508.47 : 98,681.71 = 39,677.60 : x
  2. Step 2: Convert to fraction form
    71,508.47/98,681.71 = 39,677.60/x
  3. Step 3: Cross multiply
    71,508.47x = 98,681.71 × 39,677.60
  4. Step 4: Simplify right side
    71,508.47x = 3,915,453,416.70
  5. Step 5: Solve for x
    x = 3,915,453,416.70/71,508.47
  6. Step 6: Final answer
    x = 54,755.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.