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Finding the Fourth Proportional to 87,549.84, 131,327.64 and 28,386

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Solution

The fourth proportional to 87,549.84, 131,327.64 and 28,386 is: 42,579.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,549.84 : 131,327.64 = 28,386 : x
  2. Step 2: Convert to fraction form
    87,549.84/131,327.64 = 28,386/x
  3. Step 3: Cross multiply
    87,549.84x = 131,327.64 × 28,386
  4. Step 4: Simplify right side
    87,549.84x = 3,727,866,389.04
  5. Step 5: Solve for x
    x = 3,727,866,389.04/87,549.84
  6. Step 6: Final answer
    x = 42,579.93

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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.