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Finding the Fourth Proportional to 71,209.66, 98,269.98 and 39,380.68

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Solution

The fourth proportional to 71,209.66, 98,269.98 and 39,380.68 is: 54,345.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,209.66 : 98,269.98 = 39,380.68 : x
  2. Step 2: Convert to fraction form
    71,209.66/98,269.98 = 39,380.68/x
  3. Step 3: Cross multiply
    71,209.66x = 98,269.98 × 39,380.68
  4. Step 4: Simplify right side
    71,209.66x = 3,869,938,635.99
  5. Step 5: Solve for x
    x = 3,869,938,635.99/71,209.66
  6. Step 6: Final answer
    x = 54,345.70

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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.