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Finding the Fourth Proportional to 125,250.78, 172,850.07 and 68,661.66

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Solution

The fourth proportional to 125,250.78, 172,850.07 and 68,661.66 is: 94,755.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,250.78 : 172,850.07 = 68,661.66 : x
  2. Step 2: Convert to fraction form
    125,250.78/172,850.07 = 68,661.66/x
  3. Step 3: Cross multiply
    125,250.78x = 172,850.07 × 68,661.66
  4. Step 4: Simplify right side
    125,250.78x = 11,868,172,737.32
  5. Step 5: Solve for x
    x = 11,868,172,737.32/125,250.78
  6. Step 6: Final answer
    x = 94,755.28

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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.