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Finding the Fourth Proportional to 120,162.80, 179,855.40 and 110,831.60

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Solution

The fourth proportional to 120,162.80, 179,855.40 and 110,831.60 is: 165,888.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,162.80 : 179,855.40 = 110,831.60 : x
  2. Step 2: Convert to fraction form
    120,162.80/179,855.40 = 110,831.60/x
  3. Step 3: Cross multiply
    120,162.80x = 179,855.40 × 110,831.60
  4. Step 4: Simplify right side
    120,162.80x = 19,933,661,750.64
  5. Step 5: Solve for x
    x = 19,933,661,750.64/120,162.80
  6. Step 6: Final answer
    x = 165,888.79

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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.