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Finding the Fourth Proportional to 80,013.70, 120,017.40 and 20,849.86

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Solution

The fourth proportional to 80,013.70, 120,017.40 and 20,849.86 is: 31,273.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,013.70 : 120,017.40 = 20,849.86 : x
  2. Step 2: Convert to fraction form
    80,013.70/120,017.40 = 20,849.86/x
  3. Step 3: Cross multiply
    80,013.70x = 120,017.40 × 20,849.86
  4. Step 4: Simplify right side
    80,013.70x = 2,502,345,987.56
  5. Step 5: Solve for x
    x = 2,502,345,987.56/80,013.70
  6. Step 6: Final answer
    x = 31,273.97

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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.