Home / 138,800.79-191,545.05-75,138.54

Finding the Fourth Proportional to 138,800.79, 191,545.05 and 75,138.54

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Solution

The fourth proportional to 138,800.79, 191,545.05 and 75,138.54 is: 103,691.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,800.79 : 191,545.05 = 75,138.54 : x
  2. Step 2: Convert to fraction form
    138,800.79/191,545.05 = 75,138.54/x
  3. Step 3: Cross multiply
    138,800.79x = 191,545.05 × 75,138.54
  4. Step 4: Simplify right side
    138,800.79x = 14,392,414,964.70
  5. Step 5: Solve for x
    x = 14,392,414,964.70/138,800.79
  6. Step 6: Final answer
    x = 103,691.16

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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.