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Finding the Fourth Proportional to 80,796.80, 111,436.88 and 71,731.74

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Solution

The fourth proportional to 80,796.80, 111,436.88 and 71,731.74 is: 98,934.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,796.80 : 111,436.88 = 71,731.74 : x
  2. Step 2: Convert to fraction form
    80,796.80/111,436.88 = 71,731.74/x
  3. Step 3: Cross multiply
    80,796.80x = 111,436.88 × 71,731.74
  4. Step 4: Simplify right side
    80,796.80x = 7,993,561,302.57
  5. Step 5: Solve for x
    x = 7,993,561,302.57/80,796.80
  6. Step 6: Final answer
    x = 98,934.13

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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.