Home / 100,442.32-138,614.38-55,121.92

Finding the Fourth Proportional to 100,442.32, 138,614.38 and 55,121.92

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Solution

The fourth proportional to 100,442.32, 138,614.38 and 55,121.92 is: 76,070.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,442.32 : 138,614.38 = 55,121.92 : x
  2. Step 2: Convert to fraction form
    100,442.32/138,614.38 = 55,121.92/x
  3. Step 3: Cross multiply
    100,442.32x = 138,614.38 × 55,121.92
  4. Step 4: Simplify right side
    100,442.32x = 7,640,691,294.26
  5. Step 5: Solve for x
    x = 7,640,691,294.26/100,442.32
  6. Step 6: Final answer
    x = 76,070.44

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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.