Home / 87,589.12-120,595.20-79,606.72

Finding the Fourth Proportional to 87,589.12, 120,595.20 and 79,606.72

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Solution

The fourth proportional to 87,589.12, 120,595.20 and 79,606.72 is: 109,604.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,589.12 : 120,595.20 = 79,606.72 : x
  2. Step 2: Convert to fraction form
    87,589.12/120,595.20 = 79,606.72/x
  3. Step 3: Cross multiply
    87,589.12x = 120,595.20 × 79,606.72
  4. Step 4: Simplify right side
    87,589.12x = 9,600,188,319.74
  5. Step 5: Solve for x
    x = 9,600,188,319.74/87,589.12
  6. Step 6: Final answer
    x = 109,604.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.