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Finding the Fourth Proportional to 120,800.85, 166,710.71 and 67,086.11

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Solution

The fourth proportional to 120,800.85, 166,710.71 and 67,086.11 is: 92,581.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,800.85 : 166,710.71 = 67,086.11 : x
  2. Step 2: Convert to fraction form
    120,800.85/166,710.71 = 67,086.11/x
  3. Step 3: Cross multiply
    120,800.85x = 166,710.71 × 67,086.11
  4. Step 4: Simplify right side
    120,800.85x = 11,183,971,860.25
  5. Step 5: Solve for x
    x = 11,183,971,860.25/120,800.85
  6. Step 6: Final answer
    x = 92,581.90

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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.