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Finding the Fourth Proportional to 71,581.38, 98,781.74 and 39,750.38

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Solution

The fourth proportional to 71,581.38, 98,781.74 and 39,750.38 is: 54,855.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,581.38 : 98,781.74 = 39,750.38 : x
  2. Step 2: Convert to fraction form
    71,581.38/98,781.74 = 39,750.38/x
  3. Step 3: Cross multiply
    71,581.38x = 98,781.74 × 39,750.38
  4. Step 4: Simplify right side
    71,581.38x = 3,926,611,702.06
  5. Step 5: Solve for x
    x = 3,926,611,702.06/71,581.38
  6. Step 6: Final answer
    x = 54,855.21

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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.