Home / 80,658.96-120,988.03-20,687.18

Finding the Fourth Proportional to 80,658.96, 120,988.03 and 20,687.18

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Solution

The fourth proportional to 80,658.96, 120,988.03 and 20,687.18 is: 31,030.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,658.96 : 120,988.03 = 20,687.18 : x
  2. Step 2: Convert to fraction form
    80,658.96/120,988.03 = 20,687.18/x
  3. Step 3: Cross multiply
    80,658.96x = 120,988.03 × 20,687.18
  4. Step 4: Simplify right side
    80,658.96x = 2,502,901,154.46
  5. Step 5: Solve for x
    x = 2,502,901,154.46/80,658.96
  6. Step 6: Final answer
    x = 31,030.66

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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.