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Finding the Fourth Proportional to 120,874.68, 166,806.14 and 67,158.72

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Solution

The fourth proportional to 120,874.68, 166,806.14 and 67,158.72 is: 92,678.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,874.68 : 166,806.14 = 67,158.72 : x
  2. Step 2: Convert to fraction form
    120,874.68/166,806.14 = 67,158.72/x
  3. Step 3: Cross multiply
    120,874.68x = 166,806.14 × 67,158.72
  4. Step 4: Simplify right side
    120,874.68x = 11,202,486,514.75
  5. Step 5: Solve for x
    x = 11,202,486,514.75/120,874.68
  6. Step 6: Final answer
    x = 92,678.52

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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.