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Finding the Fourth Proportional to 408,552.06, 612,926.48 and 128,069.30

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Solution

The fourth proportional to 408,552.06, 612,926.48 and 128,069.30 is: 192,134.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,552.06 : 612,926.48 = 128,069.30 : x
  2. Step 2: Convert to fraction form
    408,552.06/612,926.48 = 128,069.30/x
  3. Step 3: Cross multiply
    408,552.06x = 612,926.48 × 128,069.30
  4. Step 4: Simplify right side
    408,552.06x = 78,497,065,245.06
  5. Step 5: Solve for x
    x = 78,497,065,245.06/408,552.06
  6. Step 6: Final answer
    x = 192,134.79

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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.