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Finding the Fourth Proportional to 120,902.15, 166,839.91 and 67,186.69

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Solution

The fourth proportional to 120,902.15, 166,839.91 and 67,186.69 is: 92,714.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,902.15 : 166,839.91 = 67,186.69 : x
  2. Step 2: Convert to fraction form
    120,902.15/166,839.91 = 67,186.69/x
  3. Step 3: Cross multiply
    120,902.15x = 166,839.91 × 67,186.69
  4. Step 4: Simplify right side
    120,902.15x = 11,209,420,727.73
  5. Step 5: Solve for x
    x = 11,209,420,727.73/120,902.15
  6. Step 6: Final answer
    x = 92,714.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.