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Finding the Fourth Proportional to 125,067.78, 187,553.82 and 61,866.21

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Solution

The fourth proportional to 125,067.78, 187,553.82 and 61,866.21 is: 92,775.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,067.78 : 187,553.82 = 61,866.21 : x
  2. Step 2: Convert to fraction form
    125,067.78/187,553.82 = 61,866.21/x
  3. Step 3: Cross multiply
    125,067.78x = 187,553.82 × 61,866.21
  4. Step 4: Simplify right side
    125,067.78x = 11,603,244,014.42
  5. Step 5: Solve for x
    x = 11,603,244,014.42/125,067.78
  6. Step 6: Final answer
    x = 92,775.65

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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.