Home / 138,742.20-208,146.90-40,246.20

Finding the Fourth Proportional to 138,742.20, 208,146.90 and 40,246.20

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Solution

The fourth proportional to 138,742.20, 208,146.90 and 40,246.20 is: 60,379.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,742.20 : 208,146.90 = 40,246.20 : x
  2. Step 2: Convert to fraction form
    138,742.20/208,146.90 = 40,246.20/x
  3. Step 3: Cross multiply
    138,742.20x = 208,146.90 × 40,246.20
  4. Step 4: Simplify right side
    138,742.20x = 8,377,121,766.78
  5. Step 5: Solve for x
    x = 8,377,121,766.78/138,742.20
  6. Step 6: Final answer
    x = 60,379.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.