Home / 138,800.30-191,545.03-75,138.10

Finding the Fourth Proportional to 138,800.30, 191,545.03 and 75,138.10

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Solution

The fourth proportional to 138,800.30, 191,545.03 and 75,138.10 is: 103,690.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,800.30 : 191,545.03 = 75,138.10 : x
  2. Step 2: Convert to fraction form
    138,800.30/191,545.03 = 75,138.10/x
  3. Step 3: Cross multiply
    138,800.30x = 191,545.03 × 75,138.10
  4. Step 4: Simplify right side
    138,800.30x = 14,392,328,811.05
  5. Step 5: Solve for x
    x = 14,392,328,811.05/138,800.30
  6. Step 6: Final answer
    x = 103,690.91

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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.