Home / 87,421.12-131,131.52-31,986.88

Finding the Fourth Proportional to 87,421.12, 131,131.52 and 31,986.88

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Solution

The fourth proportional to 87,421.12, 131,131.52 and 31,986.88 is: 47,980.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,421.12 : 131,131.52 = 31,986.88 : x
  2. Step 2: Convert to fraction form
    87,421.12/131,131.52 = 31,986.88/x
  3. Step 3: Cross multiply
    87,421.12x = 131,131.52 × 31,986.88
  4. Step 4: Simplify right side
    87,421.12x = 4,194,488,194.46
  5. Step 5: Solve for x
    x = 4,194,488,194.46/87,421.12
  6. Step 6: Final answer
    x = 47,980.26

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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.