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Finding the Fourth Proportional to 80,990.61, 111,767.21 and 45,179.70

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Solution

The fourth proportional to 80,990.61, 111,767.21 and 45,179.70 is: 62,348.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,990.61 : 111,767.21 = 45,179.70 : x
  2. Step 2: Convert to fraction form
    80,990.61/111,767.21 = 45,179.70/x
  3. Step 3: Cross multiply
    80,990.61x = 111,767.21 × 45,179.70
  4. Step 4: Simplify right side
    80,990.61x = 5,049,609,017.64
  5. Step 5: Solve for x
    x = 5,049,609,017.64/80,990.61
  6. Step 6: Final answer
    x = 62,348.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.