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Finding the Fourth Proportional to 71,140.35, 98,173.94 and 38,874.97

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Solution

The fourth proportional to 71,140.35, 98,173.94 and 38,874.97 is: 53,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,140.35 : 98,173.94 = 38,874.97 : x
  2. Step 2: Convert to fraction form
    71,140.35/98,173.94 = 38,874.97/x
  3. Step 3: Cross multiply
    71,140.35x = 98,173.94 × 38,874.97
  4. Step 4: Simplify right side
    71,140.35x = 3,816,508,972.28
  5. Step 5: Solve for x
    x = 3,816,508,972.28/71,140.35
  6. Step 6: Final answer
    x = 53,647.60

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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.