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Finding the Fourth Proportional to 173,766.36, 239,726.31 and 105,728.79

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Solution

The fourth proportional to 173,766.36, 239,726.31 and 105,728.79 is: 145,862.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,766.36 : 239,726.31 = 105,728.79 : x
  2. Step 2: Convert to fraction form
    173,766.36/239,726.31 = 105,728.79/x
  3. Step 3: Cross multiply
    173,766.36x = 239,726.31 × 105,728.79
  4. Step 4: Simplify right side
    173,766.36x = 25,345,972,687.46
  5. Step 5: Solve for x
    x = 25,345,972,687.46/173,766.36
  6. Step 6: Final answer
    x = 145,862.37

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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.