Home / 129,373.05-178,530.17-72,010.47

Finding the Fourth Proportional to 129,373.05, 178,530.17 and 72,010.47

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Solution

The fourth proportional to 129,373.05, 178,530.17 and 72,010.47 is: 99,371.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,373.05 : 178,530.17 = 72,010.47 : x
  2. Step 2: Convert to fraction form
    129,373.05/178,530.17 = 72,010.47/x
  3. Step 3: Cross multiply
    129,373.05x = 178,530.17 × 72,010.47
  4. Step 4: Simplify right side
    129,373.05x = 12,856,041,090.83
  5. Step 5: Solve for x
    x = 12,856,041,090.83/129,373.05
  6. Step 6: Final answer
    x = 99,371.86

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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.