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Finding the Fourth Proportional to 120,317.69, 166,037.78 and 65,874.80

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Solution

The fourth proportional to 120,317.69, 166,037.78 and 65,874.80 is: 90,906.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,317.69 : 166,037.78 = 65,874.80 : x
  2. Step 2: Convert to fraction form
    120,317.69/166,037.78 = 65,874.80/x
  3. Step 3: Cross multiply
    120,317.69x = 166,037.78 × 65,874.80
  4. Step 4: Simplify right side
    120,317.69x = 10,937,706,129.73
  5. Step 5: Solve for x
    x = 10,937,706,129.73/120,317.69
  6. Step 6: Final answer
    x = 90,906.88

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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.