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Finding the Fourth Proportional to 129,329.88, 178,473.51 and 72,741.26

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Solution

The fourth proportional to 129,329.88, 178,473.51 and 72,741.26 is: 100,381.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,329.88 : 178,473.51 = 72,741.26 : x
  2. Step 2: Convert to fraction form
    129,329.88/178,473.51 = 72,741.26/x
  3. Step 3: Cross multiply
    129,329.88x = 178,473.51 × 72,741.26
  4. Step 4: Simplify right side
    129,329.88x = 12,982,387,101.66
  5. Step 5: Solve for x
    x = 12,982,387,101.66/129,329.88
  6. Step 6: Final answer
    x = 100,381.96

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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.