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Finding the Fourth Proportional to 87,666.60, 131,499.90 and 28,504.20

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Solution

The fourth proportional to 87,666.60, 131,499.90 and 28,504.20 is: 42,756.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,666.60 : 131,499.90 = 28,504.20 : x
  2. Step 2: Convert to fraction form
    87,666.60/131,499.90 = 28,504.20/x
  3. Step 3: Cross multiply
    87,666.60x = 131,499.90 × 28,504.20
  4. Step 4: Simplify right side
    87,666.60x = 3,748,299,449.58
  5. Step 5: Solve for x
    x = 3,748,299,449.58/87,666.60
  6. Step 6: Final answer
    x = 42,756.30

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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.