Home / 138,660.12-207,990.18-45,165.84

Finding the Fourth Proportional to 138,660.12, 207,990.18 and 45,165.84

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Solution

The fourth proportional to 138,660.12, 207,990.18 and 45,165.84 is: 67,748.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,660.12 : 207,990.18 = 45,165.84 : x
  2. Step 2: Convert to fraction form
    138,660.12/207,990.18 = 45,165.84/x
  3. Step 3: Cross multiply
    138,660.12x = 207,990.18 × 45,165.84
  4. Step 4: Simplify right side
    138,660.12x = 9,394,051,191.45
  5. Step 5: Solve for x
    x = 9,394,051,191.45/138,660.12
  6. Step 6: Final answer
    x = 67,748.76

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Similar ratio
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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.