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Finding the Fourth Proportional to 87,485.80, 131,034.30 and 71,933.80

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Solution

The fourth proportional to 87,485.80, 131,034.30 and 71,933.80 is: 107,740.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,485.80 : 131,034.30 = 71,933.80 : x
  2. Step 2: Convert to fraction form
    87,485.80/131,034.30 = 71,933.80/x
  3. Step 3: Cross multiply
    87,485.80x = 131,034.30 × 71,933.80
  4. Step 4: Simplify right side
    87,485.80x = 9,425,795,129.34
  5. Step 5: Solve for x
    x = 9,425,795,129.34/87,485.80
  6. Step 6: Final answer
    x = 107,740.86

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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.