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Finding the Fourth Proportional to 87,706.42, 131,529.86 and 28,527.42

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Solution

The fourth proportional to 87,706.42, 131,529.86 and 28,527.42 is: 42,781.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,706.42 : 131,529.86 = 28,527.42 : x
  2. Step 2: Convert to fraction form
    87,706.42/131,529.86 = 28,527.42/x
  3. Step 3: Cross multiply
    87,706.42x = 131,529.86 × 28,527.42
  4. Step 4: Simplify right side
    87,706.42x = 3,752,207,558.76
  5. Step 5: Solve for x
    x = 3,752,207,558.76/87,706.42
  6. Step 6: Final answer
    x = 42,781.45

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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.