Home / 83,656.80-124,891.20-80,157.60

Finding the Fourth Proportional to 83,656.80, 124,891.20 and 80,157.60

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Solution

The fourth proportional to 83,656.80, 124,891.20 and 80,157.60 is: 119,667.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,656.80 : 124,891.20 = 80,157.60 : x
  2. Step 2: Convert to fraction form
    83,656.80/124,891.20 = 80,157.60/x
  3. Step 3: Cross multiply
    83,656.80x = 124,891.20 × 80,157.60
  4. Step 4: Simplify right side
    83,656.80x = 10,010,978,853.12
  5. Step 5: Solve for x
    x = 10,010,978,853.12/83,656.80
  6. Step 6: Final answer
    x = 119,667.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.