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Finding the Fourth Proportional to 199,870.88, 275,795.28 and 128,347.88

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Solution

The fourth proportional to 199,870.88, 275,795.28 and 128,347.88 is: 177,103.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,870.88 : 275,795.28 = 128,347.88 : x
  2. Step 2: Convert to fraction form
    199,870.88/275,795.28 = 128,347.88/x
  3. Step 3: Cross multiply
    199,870.88x = 275,795.28 × 128,347.88
  4. Step 4: Simplify right side
    199,870.88x = 35,397,738,123.03
  5. Step 5: Solve for x
    x = 35,397,738,123.03/199,870.88
  6. Step 6: Final answer
    x = 177,103.03

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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.