Home / 129,424.78-193,935.18-81,939.34

Finding the Fourth Proportional to 129,424.78, 193,935.18 and 81,939.34

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Solution

The fourth proportional to 129,424.78, 193,935.18 and 81,939.34 is: 122,781.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,424.78 : 193,935.18 = 81,939.34 : x
  2. Step 2: Convert to fraction form
    129,424.78/193,935.18 = 81,939.34/x
  3. Step 3: Cross multiply
    129,424.78x = 193,935.18 × 81,939.34
  4. Step 4: Simplify right side
    129,424.78x = 15,890,920,651.98
  5. Step 5: Solve for x
    x = 15,890,920,651.98/129,424.78
  6. Step 6: Final answer
    x = 122,781.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.