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Finding the Fourth Proportional to 71,402.69, 98,538.92 and 39,569.52

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Solution

The fourth proportional to 71,402.69, 98,538.92 and 39,569.52 is: 54,607.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,402.69 : 98,538.92 = 39,569.52 : x
  2. Step 2: Convert to fraction form
    71,402.69/98,538.92 = 39,569.52/x
  3. Step 3: Cross multiply
    71,402.69x = 98,538.92 × 39,569.52
  4. Step 4: Simplify right side
    71,402.69x = 3,899,137,567.87
  5. Step 5: Solve for x
    x = 3,899,137,567.87/71,402.69
  6. Step 6: Final answer
    x = 54,607.72

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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.