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Finding the Fourth Proportional to 80,387.91, 120,611.12 and 27,802.71

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Solution

The fourth proportional to 80,387.91, 120,611.12 and 27,802.71 is: 41,714.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,387.91 : 120,611.12 = 27,802.71 : x
  2. Step 2: Convert to fraction form
    80,387.91/120,611.12 = 27,802.71/x
  3. Step 3: Cross multiply
    80,387.91x = 120,611.12 × 27,802.71
  4. Step 4: Simplify right side
    80,387.91x = 3,353,315,853.12
  5. Step 5: Solve for x
    x = 3,353,315,853.12/80,387.91
  6. Step 6: Final answer
    x = 41,714.18

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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.