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Finding the Fourth Proportional to 120,060.65, 179,965.83 and 45,129.17

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Solution

The fourth proportional to 120,060.65, 179,965.83 and 45,129.17 is: 67,646.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,060.65 : 179,965.83 = 45,129.17 : x
  2. Step 2: Convert to fraction form
    120,060.65/179,965.83 = 45,129.17/x
  3. Step 3: Cross multiply
    120,060.65x = 179,965.83 × 45,129.17
  4. Step 4: Simplify right side
    120,060.65x = 8,121,708,536.26
  5. Step 5: Solve for x
    x = 8,121,708,536.26/120,060.65
  6. Step 6: Final answer
    x = 67,646.71

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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.