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Finding the Fourth Proportional to 172,390.40, 258,585.56 and 54,072.08

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Solution

The fourth proportional to 172,390.40, 258,585.56 and 54,072.08 is: 81,108.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,390.40 : 258,585.56 = 54,072.08 : x
  2. Step 2: Convert to fraction form
    172,390.40/258,585.56 = 54,072.08/x
  3. Step 3: Cross multiply
    172,390.40x = 258,585.56 × 54,072.08
  4. Step 4: Simplify right side
    172,390.40x = 13,982,259,087.16
  5. Step 5: Solve for x
    x = 13,982,259,087.16/172,390.40
  6. Step 6: Final answer
    x = 81,108.11

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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.