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Finding the Fourth Proportional to 123,234.54, 170,062.92 and 66,645.78

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Solution

The fourth proportional to 123,234.54, 170,062.92 and 66,645.78 is: 91,970.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,234.54 : 170,062.92 = 66,645.78 : x
  2. Step 2: Convert to fraction form
    123,234.54/170,062.92 = 66,645.78/x
  3. Step 3: Cross multiply
    123,234.54x = 170,062.92 × 66,645.78
  4. Step 4: Simplify right side
    123,234.54x = 11,333,975,952.48
  5. Step 5: Solve for x
    x = 11,333,975,952.48/123,234.54
  6. Step 6: Final answer
    x = 91,970.77

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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.