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Finding the Fourth Proportional to 129,651.68, 178,929.84 and 73,066.88

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Solution

The fourth proportional to 129,651.68, 178,929.84 and 73,066.88 is: 100,838.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,651.68 : 178,929.84 = 73,066.88 : x
  2. Step 2: Convert to fraction form
    129,651.68/178,929.84 = 73,066.88/x
  3. Step 3: Cross multiply
    129,651.68x = 178,929.84 × 73,066.88
  4. Step 4: Simplify right side
    129,651.68x = 13,073,845,147.70
  5. Step 5: Solve for x
    x = 13,073,845,147.70/129,651.68
  6. Step 6: Final answer
    x = 100,838.22

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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.