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Finding the Fourth Proportional to 120,043.92, 165,656.15 and 66,327.78

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Solution

The fourth proportional to 120,043.92, 165,656.15 and 66,327.78 is: 91,529.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,043.92 : 165,656.15 = 66,327.78 : x
  2. Step 2: Convert to fraction form
    120,043.92/165,656.15 = 66,327.78/x
  3. Step 3: Cross multiply
    120,043.92x = 165,656.15 × 66,327.78
  4. Step 4: Simplify right side
    120,043.92x = 10,987,604,672.85
  5. Step 5: Solve for x
    x = 10,987,604,672.85/120,043.92
  6. Step 6: Final answer
    x = 91,529.87

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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.