Home / 129,711.15-178,993.68-75,259.11

Finding the Fourth Proportional to 129,711.15, 178,993.68 and 75,259.11

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Solution

The fourth proportional to 129,711.15, 178,993.68 and 75,259.11 is: 103,853.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,711.15 : 178,993.68 = 75,259.11 : x
  2. Step 2: Convert to fraction form
    129,711.15/178,993.68 = 75,259.11/x
  3. Step 3: Cross multiply
    129,711.15x = 178,993.68 × 75,259.11
  4. Step 4: Simplify right side
    129,711.15x = 13,470,904,663.42
  5. Step 5: Solve for x
    x = 13,470,904,663.42/129,711.15
  6. Step 6: Final answer
    x = 103,853.09

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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.