Home / 100,375.30-138,170.18-86,757.10

Finding the Fourth Proportional to 100,375.30, 138,170.18 and 86,757.10

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Solution

The fourth proportional to 100,375.30, 138,170.18 and 86,757.10 is: 119,424.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,375.30 : 138,170.18 = 86,757.10 : x
  2. Step 2: Convert to fraction form
    100,375.30/138,170.18 = 86,757.10/x
  3. Step 3: Cross multiply
    100,375.30x = 138,170.18 × 86,757.10
  4. Step 4: Simplify right side
    100,375.30x = 11,987,244,123.28
  5. Step 5: Solve for x
    x = 11,987,244,123.28/100,375.30
  6. Step 6: Final answer
    x = 119,424.24

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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.