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Finding the Fourth Proportional to 80,722.98, 111,407.60 and 48,891.80

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Solution

The fourth proportional to 80,722.98, 111,407.60 and 48,891.80 is: 67,476.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,722.98 : 111,407.60 = 48,891.80 : x
  2. Step 2: Convert to fraction form
    80,722.98/111,407.60 = 48,891.80/x
  3. Step 3: Cross multiply
    80,722.98x = 111,407.60 × 48,891.80
  4. Step 4: Simplify right side
    80,722.98x = 5,446,918,498.43
  5. Step 5: Solve for x
    x = 5,446,918,498.43/80,722.98
  6. Step 6: Final answer
    x = 67,476.68

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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.