Home / 125,375.16-172,921.12-87,134.24

Finding the Fourth Proportional to 125,375.16, 172,921.12 and 87,134.24

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Solution

The fourth proportional to 125,375.16, 172,921.12 and 87,134.24 is: 120,178.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,375.16 : 172,921.12 = 87,134.24 : x
  2. Step 2: Convert to fraction form
    125,375.16/172,921.12 = 87,134.24/x
  3. Step 3: Cross multiply
    125,375.16x = 172,921.12 × 87,134.24
  4. Step 4: Simplify right side
    125,375.16x = 15,067,350,371.15
  5. Step 5: Solve for x
    x = 15,067,350,371.15/125,375.16
  6. Step 6: Final answer
    x = 120,178.11

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1.5x scale

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.