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Finding the Fourth Proportional to 129,672.72, 178,937.64 and 73,098

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Solution

The fourth proportional to 129,672.72, 178,937.64 and 73,098 is: 100,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,672.72 : 178,937.64 = 73,098 : x
  2. Step 2: Convert to fraction form
    129,672.72/178,937.64 = 73,098/x
  3. Step 3: Cross multiply
    129,672.72x = 178,937.64 × 73,098
  4. Step 4: Simplify right side
    129,672.72x = 13,079,983,608.72
  5. Step 5: Solve for x
    x = 13,079,983,608.72/129,672.72
  6. Step 6: Final answer
    x = 100,869.20

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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.