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Finding the Fourth Proportional to 71,187.56, 98,240.89 and 39,358.52

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Solution

The fourth proportional to 71,187.56, 98,240.89 and 39,358.52 is: 54,315.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,187.56 : 98,240.89 = 39,358.52 : x
  2. Step 2: Convert to fraction form
    71,187.56/98,240.89 = 39,358.52/x
  3. Step 3: Cross multiply
    71,187.56x = 98,240.89 × 39,358.52
  4. Step 4: Simplify right side
    71,187.56x = 3,866,615,444.28
  5. Step 5: Solve for x
    x = 3,866,615,444.28/71,187.56
  6. Step 6: Final answer
    x = 54,315.88

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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.