Home / 138,589.68-191,252.82-78,160.85

Finding the Fourth Proportional to 138,589.68, 191,252.82 and 78,160.85

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Solution

The fourth proportional to 138,589.68, 191,252.82 and 78,160.85 is: 107,861.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,589.68 : 191,252.82 = 78,160.85 : x
  2. Step 2: Convert to fraction form
    138,589.68/191,252.82 = 78,160.85/x
  3. Step 3: Cross multiply
    138,589.68x = 191,252.82 × 78,160.85
  4. Step 4: Simplify right side
    138,589.68x = 14,948,482,019.83
  5. Step 5: Solve for x
    x = 14,948,482,019.83/138,589.68
  6. Step 6: Final answer
    x = 107,861.44

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1.5x scale

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.