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Finding the Fourth Proportional to 129,806.52, 179,129.72 and 73,213.44

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Solution

The fourth proportional to 129,806.52, 179,129.72 and 73,213.44 is: 101,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,806.52 : 179,129.72 = 73,213.44 : x
  2. Step 2: Convert to fraction form
    129,806.52/179,129.72 = 73,213.44/x
  3. Step 3: Cross multiply
    129,806.52x = 179,129.72 × 73,213.44
  4. Step 4: Simplify right side
    129,806.52x = 13,114,703,007.44
  5. Step 5: Solve for x
    x = 13,114,703,007.44/129,806.52
  6. Step 6: Final answer
    x = 101,032.70

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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.