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Finding the Fourth Proportional to 78,414.76, 117,397.50 and 73,448.68

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Solution

The fourth proportional to 78,414.76, 117,397.50 and 73,448.68 is: 109,962.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,414.76 : 117,397.50 = 73,448.68 : x
  2. Step 2: Convert to fraction form
    78,414.76/117,397.50 = 73,448.68/x
  3. Step 3: Cross multiply
    78,414.76x = 117,397.50 × 73,448.68
  4. Step 4: Simplify right side
    78,414.76x = 8,622,691,410.30
  5. Step 5: Solve for x
    x = 8,622,691,410.30/78,414.76
  6. Step 6: Final answer
    x = 109,962.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.