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Finding the Fourth Proportional to 172,418.99, 258,661.28 and 54,058.55

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Solution

The fourth proportional to 172,418.99, 258,661.28 and 54,058.55 is: 81,098.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,418.99 : 258,661.28 = 54,058.55 : x
  2. Step 2: Convert to fraction form
    172,418.99/258,661.28 = 54,058.55/x
  3. Step 3: Cross multiply
    172,418.99x = 258,661.28 × 54,058.55
  4. Step 4: Simplify right side
    172,418.99x = 13,982,852,579.78
  5. Step 5: Solve for x
    x = 13,982,852,579.78/172,418.99
  6. Step 6: Final answer
    x = 81,098.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.