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Finding the Fourth Proportional to 71,539.96, 98,710.52 and 39,702.12

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Solution

The fourth proportional to 71,539.96, 98,710.52 and 39,702.12 is: 54,780.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,539.96 : 98,710.52 = 39,702.12 : x
  2. Step 2: Convert to fraction form
    71,539.96/98,710.52 = 39,702.12/x
  3. Step 3: Cross multiply
    71,539.96x = 98,710.52 × 39,702.12
  4. Step 4: Simplify right side
    71,539.96x = 3,919,016,910.30
  5. Step 5: Solve for x
    x = 3,919,016,910.30/71,539.96
  6. Step 6: Final answer
    x = 54,780.81

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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.