Home / 87,990.16-131,998.80-28,811.56

Finding the Fourth Proportional to 87,990.16, 131,998.80 and 28,811.56

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Solution

The fourth proportional to 87,990.16, 131,998.80 and 28,811.56 is: 43,221.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,990.16 : 131,998.80 = 28,811.56 : x
  2. Step 2: Convert to fraction form
    87,990.16/131,998.80 = 28,811.56/x
  3. Step 3: Cross multiply
    87,990.16x = 131,998.80 × 28,811.56
  4. Step 4: Simplify right side
    87,990.16x = 3,803,091,346.13
  5. Step 5: Solve for x
    x = 3,803,091,346.13/87,990.16
  6. Step 6: Final answer
    x = 43,221.78

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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.