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Finding the Fourth Proportional to 125,070, 172,596.60 and 68,481.78

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Solution

The fourth proportional to 125,070, 172,596.60 and 68,481.78 is: 94,504.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,070 : 172,596.60 = 68,481.78 : x
  2. Step 2: Convert to fraction form
    125,070/172,596.60 = 68,481.78/x
  3. Step 3: Cross multiply
    125,070x = 172,596.60 × 68,481.78
  4. Step 4: Simplify right side
    125,070x = 11,819,722,389.95
  5. Step 5: Solve for x
    x = 11,819,722,389.95/125,070
  6. Step 6: Final answer
    x = 94,504.86

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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.