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Finding the Fourth Proportional to 87,728.84, 120,956.08 and 73,213.92

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Solution

The fourth proportional to 87,728.84, 120,956.08 and 73,213.92 is: 100,943.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,728.84 : 120,956.08 = 73,213.92 : x
  2. Step 2: Convert to fraction form
    87,728.84/120,956.08 = 73,213.92/x
  3. Step 3: Cross multiply
    87,728.84x = 120,956.08 × 73,213.92
  4. Step 4: Simplify right side
    87,728.84x = 8,855,668,764.63
  5. Step 5: Solve for x
    x = 8,855,668,764.63/87,728.84
  6. Step 6: Final answer
    x = 100,943.64

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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.