Home / 138,862.20-208,358.10-72,377.40

Finding the Fourth Proportional to 138,862.20, 208,358.10 and 72,377.40

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Solution

The fourth proportional to 138,862.20, 208,358.10 and 72,377.40 is: 108,599.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,862.20 : 208,358.10 = 72,377.40 : x
  2. Step 2: Convert to fraction form
    138,862.20/208,358.10 = 72,377.40/x
  3. Step 3: Cross multiply
    138,862.20x = 208,358.10 × 72,377.40
  4. Step 4: Simplify right side
    138,862.20x = 15,080,417,546.94
  5. Step 5: Solve for x
    x = 15,080,417,546.94/138,862.20
  6. Step 6: Final answer
    x = 108,599.87

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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.