Home / 100,500.60-138,691.40-55,180.56

Finding the Fourth Proportional to 100,500.60, 138,691.40 and 55,180.56

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Solution

The fourth proportional to 100,500.60, 138,691.40 and 55,180.56 is: 76,149.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,500.60 : 138,691.40 = 55,180.56 : x
  2. Step 2: Convert to fraction form
    100,500.60/138,691.40 = 55,180.56/x
  3. Step 3: Cross multiply
    100,500.60x = 138,691.40 × 55,180.56
  4. Step 4: Simplify right side
    100,500.60x = 7,653,069,119.18
  5. Step 5: Solve for x
    x = 7,653,069,119.18/100,500.60
  6. Step 6: Final answer
    x = 76,149.49

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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.