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Finding the Fourth Proportional to 120,086.70, 179,935.65 and 75,633.90

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Solution

The fourth proportional to 120,086.70, 179,935.65 and 75,633.90 is: 113,328.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,086.70 : 179,935.65 = 75,633.90 : x
  2. Step 2: Convert to fraction form
    120,086.70/179,935.65 = 75,633.90/x
  3. Step 3: Cross multiply
    120,086.70x = 179,935.65 × 75,633.90
  4. Step 4: Simplify right side
    120,086.70x = 13,609,234,958.54
  5. Step 5: Solve for x
    x = 13,609,234,958.54/120,086.70
  6. Step 6: Final answer
    x = 113,328.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.