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Finding the Fourth Proportional to 125,378.82, 173,021.22 and 68,790.15

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Solution

The fourth proportional to 125,378.82, 173,021.22 and 68,790.15 is: 94,929.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,378.82 : 173,021.22 = 68,790.15 : x
  2. Step 2: Convert to fraction form
    125,378.82/173,021.22 = 68,790.15/x
  3. Step 3: Cross multiply
    125,378.82x = 173,021.22 × 68,790.15
  4. Step 4: Simplify right side
    125,378.82x = 11,902,155,676.98
  5. Step 5: Solve for x
    x = 11,902,155,676.98/125,378.82
  6. Step 6: Final answer
    x = 94,929.56

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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.