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Finding the Fourth Proportional to 71,642.73, 98,867.87 and 39,380.87

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Solution

The fourth proportional to 71,642.73, 98,867.87 and 39,380.87 is: 54,346.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,642.73 : 98,867.87 = 39,380.87 : x
  2. Step 2: Convert to fraction form
    71,642.73/98,867.87 = 39,380.87/x
  3. Step 3: Cross multiply
    71,642.73x = 98,867.87 × 39,380.87
  4. Step 4: Simplify right side
    71,642.73x = 3,893,502,735.65
  5. Step 5: Solve for x
    x = 3,893,502,735.65/71,642.73
  6. Step 6: Final answer
    x = 54,346.10

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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.