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Finding the Fourth Proportional to 274,047.91, 378,159.53 and 172,040.76

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Solution

The fourth proportional to 274,047.91, 378,159.53 and 172,040.76 is: 237,399.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,047.91 : 378,159.53 = 172,040.76 : x
  2. Step 2: Convert to fraction form
    274,047.91/378,159.53 = 172,040.76/x
  3. Step 3: Cross multiply
    274,047.91x = 378,159.53 × 172,040.76
  4. Step 4: Simplify right side
    274,047.91x = 65,058,852,942.44
  5. Step 5: Solve for x
    x = 65,058,852,942.44/274,047.91
  6. Step 6: Final answer
    x = 237,399.56

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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.