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Finding the Fourth Proportional to 80,038.58, 120,057.86 and 20,874.09

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Solution

The fourth proportional to 80,038.58, 120,057.86 and 20,874.09 is: 31,311.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,038.58 : 120,057.86 = 20,874.09 : x
  2. Step 2: Convert to fraction form
    80,038.58/120,057.86 = 20,874.09/x
  3. Step 3: Cross multiply
    80,038.58x = 120,057.86 × 20,874.09
  4. Step 4: Simplify right side
    80,038.58x = 2,506,098,470.48
  5. Step 5: Solve for x
    x = 2,506,098,470.48/80,038.58
  6. Step 6: Final answer
    x = 31,311.13

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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.