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Finding the Fourth Proportional to 238,659.10, 329,343.24 and 129,760

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Solution

The fourth proportional to 238,659.10, 329,343.24 and 129,760 is: 179,065.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,659.10 : 329,343.24 = 129,760 : x
  2. Step 2: Convert to fraction form
    238,659.10/329,343.24 = 129,760/x
  3. Step 3: Cross multiply
    238,659.10x = 329,343.24 × 129,760
  4. Step 4: Simplify right side
    238,659.10x = 42,735,578,822.40
  5. Step 5: Solve for x
    x = 42,735,578,822.40/238,659.10
  6. Step 6: Final answer
    x = 179,065.36

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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.