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Finding the Fourth Proportional to 87,616.60, 131,424.90 and 28,454.20

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Solution

The fourth proportional to 87,616.60, 131,424.90 and 28,454.20 is: 42,681.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,616.60 : 131,424.90 = 28,454.20 : x
  2. Step 2: Convert to fraction form
    87,616.60/131,424.90 = 28,454.20/x
  3. Step 3: Cross multiply
    87,616.60x = 131,424.90 × 28,454.20
  4. Step 4: Simplify right side
    87,616.60x = 3,739,590,389.58
  5. Step 5: Solve for x
    x = 3,739,590,389.58/87,616.60
  6. Step 6: Final answer
    x = 42,681.30

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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.