Home / 100,818.38-139,132.68-55,499.70

Finding the Fourth Proportional to 100,818.38, 139,132.68 and 55,499.70

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Solution

The fourth proportional to 100,818.38, 139,132.68 and 55,499.70 is: 76,591.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,818.38 : 139,132.68 = 55,499.70 : x
  2. Step 2: Convert to fraction form
    100,818.38/139,132.68 = 55,499.70/x
  3. Step 3: Cross multiply
    100,818.38x = 139,132.68 × 55,499.70
  4. Step 4: Simplify right side
    100,818.38x = 7,721,822,000.20
  5. Step 5: Solve for x
    x = 7,721,822,000.20/100,818.38
  6. Step 6: Final answer
    x = 76,591.41

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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.