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Finding the Fourth Proportional to 120,016.80, 179,938.80 and 67,442.40

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Solution

The fourth proportional to 120,016.80, 179,938.80 and 67,442.40 is: 101,115.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,016.80 : 179,938.80 = 67,442.40 : x
  2. Step 2: Convert to fraction form
    120,016.80/179,938.80 = 67,442.40/x
  3. Step 3: Cross multiply
    120,016.80x = 179,938.80 × 67,442.40
  4. Step 4: Simplify right side
    120,016.80x = 12,135,504,525.12
  5. Step 5: Solve for x
    x = 12,135,504,525.12/120,016.80
  6. Step 6: Final answer
    x = 101,115.05

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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.