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Finding the Fourth Proportional to 87,647.20, 131,470.80 and 82,808.80

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Solution

The fourth proportional to 87,647.20, 131,470.80 and 82,808.80 is: 124,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,647.20 : 131,470.80 = 82,808.80 : x
  2. Step 2: Convert to fraction form
    87,647.20/131,470.80 = 82,808.80/x
  3. Step 3: Cross multiply
    87,647.20x = 131,470.80 × 82,808.80
  4. Step 4: Simplify right side
    87,647.20x = 10,886,939,183.04
  5. Step 5: Solve for x
    x = 10,886,939,183.04/87,647.20
  6. Step 6: Final answer
    x = 124,213.20

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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.