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Finding the Fourth Proportional to 80,612.16, 120,920.95 and 36,239.06

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Solution

The fourth proportional to 80,612.16, 120,920.95 and 36,239.06 is: 54,359.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,612.16 : 120,920.95 = 36,239.06 : x
  2. Step 2: Convert to fraction form
    80,612.16/120,920.95 = 36,239.06/x
  3. Step 3: Cross multiply
    80,612.16x = 120,920.95 × 36,239.06
  4. Step 4: Simplify right side
    80,612.16x = 4,382,061,562.31
  5. Step 5: Solve for x
    x = 4,382,061,562.31/80,612.16
  6. Step 6: Final answer
    x = 54,359.81

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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.