Home / 139,836.20-192,959.57-78,572.66

Finding the Fourth Proportional to 139,836.20, 192,959.57 and 78,572.66

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Solution

The fourth proportional to 139,836.20, 192,959.57 and 78,572.66 is: 108,422.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,836.20 : 192,959.57 = 78,572.66 : x
  2. Step 2: Convert to fraction form
    139,836.20/192,959.57 = 78,572.66/x
  3. Step 3: Cross multiply
    139,836.20x = 192,959.57 × 78,572.66
  4. Step 4: Simplify right side
    139,836.20x = 15,161,346,008.53
  5. Step 5: Solve for x
    x = 15,161,346,008.53/139,836.20
  6. Step 6: Final answer
    x = 108,422.18

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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.