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Finding the Fourth Proportional to 120,479.87, 166,262.61 and 66,765.77

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Solution

The fourth proportional to 120,479.87, 166,262.61 and 66,765.77 is: 92,136.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,479.87 : 166,262.61 = 66,765.77 : x
  2. Step 2: Convert to fraction form
    120,479.87/166,262.61 = 66,765.77/x
  3. Step 3: Cross multiply
    120,479.87x = 166,262.61 × 66,765.77
  4. Step 4: Simplify right side
    120,479.87x = 11,100,651,178.86
  5. Step 5: Solve for x
    x = 11,100,651,178.86/120,479.87
  6. Step 6: Final answer
    x = 92,136.98

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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.