Home / 129,517.59-178,665.86-89,161.29

Finding the Fourth Proportional to 129,517.59, 178,665.86 and 89,161.29

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Solution

The fourth proportional to 129,517.59, 178,665.86 and 89,161.29 is: 122,995.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,517.59 : 178,665.86 = 89,161.29 : x
  2. Step 2: Convert to fraction form
    129,517.59/178,665.86 = 89,161.29/x
  3. Step 3: Cross multiply
    129,517.59x = 178,665.86 × 89,161.29
  4. Step 4: Simplify right side
    129,517.59x = 15,930,078,779.46
  5. Step 5: Solve for x
    x = 15,930,078,779.46/129,517.59
  6. Step 6: Final answer
    x = 122,995.48

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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.