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Finding the Fourth Proportional to 120,081.60, 179,974.74 and 67,380.36

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Solution

The fourth proportional to 120,081.60, 179,974.74 and 67,380.36 is: 100,987.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,081.60 : 179,974.74 = 67,380.36 : x
  2. Step 2: Convert to fraction form
    120,081.60/179,974.74 = 67,380.36/x
  3. Step 3: Cross multiply
    120,081.60x = 179,974.74 × 67,380.36
  4. Step 4: Simplify right side
    120,081.60x = 12,126,762,772.11
  5. Step 5: Solve for x
    x = 12,126,762,772.11/120,081.60
  6. Step 6: Final answer
    x = 100,987.68

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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.