Home / 120,387.30-166,162.12-80,102.76

Finding the Fourth Proportional to 120,387.30, 166,162.12 and 80,102.76

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Solution

The fourth proportional to 120,387.30, 166,162.12 and 80,102.76 is: 110,560.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,387.30 : 166,162.12 = 80,102.76 : x
  2. Step 2: Convert to fraction form
    120,387.30/166,162.12 = 80,102.76/x
  3. Step 3: Cross multiply
    120,387.30x = 166,162.12 × 80,102.76
  4. Step 4: Simplify right side
    120,387.30x = 13,310,044,419.45
  5. Step 5: Solve for x
    x = 13,310,044,419.45/120,387.30
  6. Step 6: Final answer
    x = 110,560.20

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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.