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Finding the Fourth Proportional to 238,620.40, 329,298.28 and 129,724.96

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Solution

The fourth proportional to 238,620.40, 329,298.28 and 129,724.96 is: 179,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,620.40 : 329,298.28 = 129,724.96 : x
  2. Step 2: Convert to fraction form
    238,620.40/329,298.28 = 129,724.96/x
  3. Step 3: Cross multiply
    238,620.40x = 329,298.28 × 129,724.96
  4. Step 4: Simplify right side
    238,620.40x = 42,718,206,201.07
  5. Step 5: Solve for x
    x = 42,718,206,201.07/238,620.40
  6. Step 6: Final answer
    x = 179,021.60

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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.