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Finding the Fourth Proportional to 120,862.62, 166,790.61 and 67,147.70

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Solution

The fourth proportional to 120,862.62, 166,790.61 and 67,147.70 is: 92,663.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,862.62 : 166,790.61 = 67,147.70 : x
  2. Step 2: Convert to fraction form
    120,862.62/166,790.61 = 67,147.70/x
  3. Step 3: Cross multiply
    120,862.62x = 166,790.61 × 67,147.70
  4. Step 4: Simplify right side
    120,862.62x = 11,199,605,009.14
  5. Step 5: Solve for x
    x = 11,199,605,009.14/120,862.62
  6. Step 6: Final answer
    x = 92,663.93

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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.