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Finding the Fourth Proportional to 172,396.90, 258,603.45 and 54,072.10

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Solution

The fourth proportional to 172,396.90, 258,603.45 and 54,072.10 is: 81,110.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,396.90 : 258,603.45 = 54,072.10 : x
  2. Step 2: Convert to fraction form
    172,396.90/258,603.45 = 54,072.10/x
  3. Step 3: Cross multiply
    172,396.90x = 258,603.45 × 54,072.10
  4. Step 4: Simplify right side
    172,396.90x = 13,983,231,608.75
  5. Step 5: Solve for x
    x = 13,983,231,608.75/172,396.90
  6. Step 6: Final answer
    x = 81,110.69

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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.