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Finding the Fourth Proportional to 120,321.98, 180,660.37 and 67,117.89

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Solution

The fourth proportional to 120,321.98, 180,660.37 and 67,117.89 is: 100,775.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,321.98 : 180,660.37 = 67,117.89 : x
  2. Step 2: Convert to fraction form
    120,321.98/180,660.37 = 67,117.89/x
  3. Step 3: Cross multiply
    120,321.98x = 180,660.37 × 67,117.89
  4. Step 4: Simplify right side
    120,321.98x = 12,125,542,841.02
  5. Step 5: Solve for x
    x = 12,125,542,841.02/120,321.98
  6. Step 6: Final answer
    x = 100,775.79

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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.