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Finding the Fourth Proportional to 87,451.44, 120,678.72 and 49,724.88

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Solution

The fourth proportional to 87,451.44, 120,678.72 and 49,724.88 is: 68,617.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,451.44 : 120,678.72 = 49,724.88 : x
  2. Step 2: Convert to fraction form
    87,451.44/120,678.72 = 49,724.88/x
  3. Step 3: Cross multiply
    87,451.44x = 120,678.72 × 49,724.88
  4. Step 4: Simplify right side
    87,451.44x = 6,000,734,870.55
  5. Step 5: Solve for x
    x = 6,000,734,870.55/87,451.44
  6. Step 6: Final answer
    x = 68,617.91

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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.