Home / 129,405.38-193,910.43-87,129.32

Finding the Fourth Proportional to 129,405.38, 193,910.43 and 87,129.32

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Solution

The fourth proportional to 129,405.38, 193,910.43 and 87,129.32 is: 130,560.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,405.38 : 193,910.43 = 87,129.32 : x
  2. Step 2: Convert to fraction form
    129,405.38/193,910.43 = 87,129.32/x
  3. Step 3: Cross multiply
    129,405.38x = 193,910.43 × 87,129.32
  4. Step 4: Simplify right side
    129,405.38x = 16,895,283,906.81
  5. Step 5: Solve for x
    x = 16,895,283,906.81/129,405.38
  6. Step 6: Final answer
    x = 130,560.91

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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.