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Finding the Fourth Proportional to 199,927.32, 275,872.98 and 128,404.22

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Solution

The fourth proportional to 199,927.32, 275,872.98 and 128,404.22 is: 177,180.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,927.32 : 275,872.98 = 128,404.22 : x
  2. Step 2: Convert to fraction form
    199,927.32/275,872.98 = 128,404.22/x
  3. Step 3: Cross multiply
    199,927.32x = 275,872.98 × 128,404.22
  4. Step 4: Simplify right side
    199,927.32x = 35,423,253,436.61
  5. Step 5: Solve for x
    x = 35,423,253,436.61/199,927.32
  6. Step 6: Final answer
    x = 177,180.65

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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.