Home / 129,942.42-179,336.10-78,963.48

Finding the Fourth Proportional to 129,942.42, 179,336.10 and 78,963.48

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Solution

The fourth proportional to 129,942.42, 179,336.10 and 78,963.48 is: 108,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,942.42 : 179,336.10 = 78,963.48 : x
  2. Step 2: Convert to fraction form
    129,942.42/179,336.10 = 78,963.48/x
  3. Step 3: Cross multiply
    129,942.42x = 179,336.10 × 78,963.48
  4. Step 4: Simplify right side
    129,942.42x = 14,161,002,545.63
  5. Step 5: Solve for x
    x = 14,161,002,545.63/129,942.42
  6. Step 6: Final answer
    x = 108,979.06

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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.