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Finding the Fourth Proportional to 87,662.20, 131,460.90 and 28,499.80

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Solution

The fourth proportional to 87,662.20, 131,460.90 and 28,499.80 is: 42,739.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,662.20 : 131,460.90 = 28,499.80 : x
  2. Step 2: Convert to fraction form
    87,662.20/131,460.90 = 28,499.80/x
  3. Step 3: Cross multiply
    87,662.20x = 131,460.90 × 28,499.80
  4. Step 4: Simplify right side
    87,662.20x = 3,746,609,357.82
  5. Step 5: Solve for x
    x = 3,746,609,357.82/87,662.20
  6. Step 6: Final answer
    x = 42,739.17

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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.