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Finding the Fourth Proportional to 238,642.60, 329,320.47 and 129,743.50

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Solution

The fourth proportional to 238,642.60, 329,320.47 and 129,743.50 is: 179,042.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,642.60 : 329,320.47 = 129,743.50 : x
  2. Step 2: Convert to fraction form
    238,642.60/329,320.47 = 129,743.50/x
  3. Step 3: Cross multiply
    238,642.60x = 329,320.47 × 129,743.50
  4. Step 4: Simplify right side
    238,642.60x = 42,727,190,399.45
  5. Step 5: Solve for x
    x = 42,727,190,399.45/238,642.60
  6. Step 6: Final answer
    x = 179,042.60

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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.