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Finding the Fourth Proportional to 71,151.90, 98,187.84 and 39,318.90

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Solution

The fourth proportional to 71,151.90, 98,187.84 and 39,318.90 is: 54,259.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,151.90 : 98,187.84 = 39,318.90 : x
  2. Step 2: Convert to fraction form
    71,151.90/98,187.84 = 39,318.90/x
  3. Step 3: Cross multiply
    71,151.90x = 98,187.84 × 39,318.90
  4. Step 4: Simplify right side
    71,151.90x = 3,860,637,862.18
  5. Step 5: Solve for x
    x = 3,860,637,862.18/71,151.90
  6. Step 6: Final answer
    x = 54,259.10

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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.