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Finding the Fourth Proportional to 238,717.78, 329,423.97 and 131,287.78

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Solution

The fourth proportional to 238,717.78, 329,423.97 and 131,287.78 is: 181,173.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,717.78 : 329,423.97 = 131,287.78 : x
  2. Step 2: Convert to fraction form
    238,717.78/329,423.97 = 131,287.78/x
  3. Step 3: Cross multiply
    238,717.78x = 329,423.97 × 131,287.78
  4. Step 4: Simplify right side
    238,717.78x = 43,249,341,700.09
  5. Step 5: Solve for x
    x = 43,249,341,700.09/238,717.78
  6. Step 6: Final answer
    x = 181,173.53

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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.