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Finding the Fourth Proportional to 103,238.76, 142,447.80 and 67,481.31

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Solution

The fourth proportional to 103,238.76, 142,447.80 and 67,481.31 is: 93,110.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,238.76 : 142,447.80 = 67,481.31 : x
  2. Step 2: Convert to fraction form
    103,238.76/142,447.80 = 67,481.31/x
  3. Step 3: Cross multiply
    103,238.76x = 142,447.80 × 67,481.31
  4. Step 4: Simplify right side
    103,238.76x = 9,612,564,150.62
  5. Step 5: Solve for x
    x = 9,612,564,150.62/103,238.76
  6. Step 6: Final answer
    x = 93,110.03

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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.