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Finding the Fourth Proportional to 80,677.80, 121,016.70 and 74,226.60

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Solution

The fourth proportional to 80,677.80, 121,016.70 and 74,226.60 is: 111,339.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,677.80 : 121,016.70 = 74,226.60 : x
  2. Step 2: Convert to fraction form
    80,677.80/121,016.70 = 74,226.60/x
  3. Step 3: Cross multiply
    80,677.80x = 121,016.70 × 74,226.60
  4. Step 4: Simplify right side
    80,677.80x = 8,982,658,184.22
  5. Step 5: Solve for x
    x = 8,982,658,184.22/80,677.80
  6. Step 6: Final answer
    x = 111,339.90

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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.