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Finding the Fourth Proportional to 80,612.13, 120,918.03 and 21,447.80

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Solution

The fourth proportional to 80,612.13, 120,918.03 and 21,447.80 is: 32,171.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,612.13 : 120,918.03 = 21,447.80 : x
  2. Step 2: Convert to fraction form
    80,612.13/120,918.03 = 21,447.80/x
  3. Step 3: Cross multiply
    80,612.13x = 120,918.03 × 21,447.80
  4. Step 4: Simplify right side
    80,612.13x = 2,593,425,199.67
  5. Step 5: Solve for x
    x = 2,593,425,199.67/80,612.13
  6. Step 6: Final answer
    x = 32,171.65

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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.