Home / 87,654.11-120,971.18-51,855.65

Finding the Fourth Proportional to 87,654.11, 120,971.18 and 51,855.65

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Solution

The fourth proportional to 87,654.11, 120,971.18 and 51,855.65 is: 71,565.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,654.11 : 120,971.18 = 51,855.65 : x
  2. Step 2: Convert to fraction form
    87,654.11/120,971.18 = 51,855.65/x
  3. Step 3: Cross multiply
    87,654.11x = 120,971.18 × 51,855.65
  4. Step 4: Simplify right side
    87,654.11x = 6,273,039,170.17
  5. Step 5: Solve for x
    x = 6,273,039,170.17/87,654.11
  6. Step 6: Final answer
    x = 71,565.83

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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.