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Finding the Fourth Proportional to 87,490.84, 131,239.14 and 28,327

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Solution

The fourth proportional to 87,490.84, 131,239.14 and 28,327 is: 42,491.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,490.84 : 131,239.14 = 28,327 : x
  2. Step 2: Convert to fraction form
    87,490.84/131,239.14 = 28,327/x
  3. Step 3: Cross multiply
    87,490.84x = 131,239.14 × 28,327
  4. Step 4: Simplify right side
    87,490.84x = 3,717,611,118.78
  5. Step 5: Solve for x
    x = 3,717,611,118.78/87,490.84
  6. Step 6: Final answer
    x = 42,491.43

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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.