Home / 138,932.20-191,712.18-78,498.10

Finding the Fourth Proportional to 138,932.20, 191,712.18 and 78,498.10

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Solution

The fourth proportional to 138,932.20, 191,712.18 and 78,498.10 is: 108,319.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,932.20 : 191,712.18 = 78,498.10 : x
  2. Step 2: Convert to fraction form
    138,932.20/191,712.18 = 78,498.10/x
  3. Step 3: Cross multiply
    138,932.20x = 191,712.18 × 78,498.10
  4. Step 4: Simplify right side
    138,932.20x = 15,049,041,876.86
  5. Step 5: Solve for x
    x = 15,049,041,876.86/138,932.20
  6. Step 6: Final answer
    x = 108,319.32

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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.