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Finding the Fourth Proportional to 125,105.50, 172,645.59 and 68,518.90

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Solution

The fourth proportional to 125,105.50, 172,645.59 and 68,518.90 is: 94,556.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,105.50 : 172,645.59 = 68,518.90 : x
  2. Step 2: Convert to fraction form
    125,105.50/172,645.59 = 68,518.90/x
  3. Step 3: Cross multiply
    125,105.50x = 172,645.59 × 68,518.90
  4. Step 4: Simplify right side
    125,105.50x = 11,829,485,916.65
  5. Step 5: Solve for x
    x = 11,829,485,916.65/125,105.50
  6. Step 6: Final answer
    x = 94,556.08

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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.