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Finding the Fourth Proportional to 71,605.20, 98,813.70 and 39,773.40

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Solution

The fourth proportional to 71,605.20, 98,813.70 and 39,773.40 is: 54,886.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,605.20 : 98,813.70 = 39,773.40 : x
  2. Step 2: Convert to fraction form
    71,605.20/98,813.70 = 39,773.40/x
  3. Step 3: Cross multiply
    71,605.20x = 98,813.70 × 39,773.40
  4. Step 4: Simplify right side
    71,605.20x = 3,930,156,815.58
  5. Step 5: Solve for x
    x = 3,930,156,815.58/71,605.20
  6. Step 6: Final answer
    x = 54,886.47

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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.