Home / 138,191.25-207,155.66-54,005.42

Finding the Fourth Proportional to 138,191.25, 207,155.66 and 54,005.42

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Solution

The fourth proportional to 138,191.25, 207,155.66 and 54,005.42 is: 80,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,191.25 : 207,155.66 = 54,005.42 : x
  2. Step 2: Convert to fraction form
    138,191.25/207,155.66 = 54,005.42/x
  3. Step 3: Cross multiply
    138,191.25x = 207,155.66 × 54,005.42
  4. Step 4: Simplify right side
    138,191.25x = 11,187,528,423.68
  5. Step 5: Solve for x
    x = 11,187,528,423.68/138,191.25
  6. Step 6: Final answer
    x = 80,956.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.