Home / 138,941.76-191,737.13-78,511.10

Finding the Fourth Proportional to 138,941.76, 191,737.13 and 78,511.10

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Solution

The fourth proportional to 138,941.76, 191,737.13 and 78,511.10 is: 108,343.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,941.76 : 191,737.13 = 78,511.10 : x
  2. Step 2: Convert to fraction form
    138,941.76/191,737.13 = 78,511.10/x
  3. Step 3: Cross multiply
    138,941.76x = 191,737.13 × 78,511.10
  4. Step 4: Simplify right side
    138,941.76x = 15,053,491,635.90
  5. Step 5: Solve for x
    x = 15,053,491,635.90/138,941.76
  6. Step 6: Final answer
    x = 108,343.90

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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.