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Finding the Fourth Proportional to 125,206.90, 172,845.41 and 71,481.56

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Solution

The fourth proportional to 125,206.90, 172,845.41 and 71,481.56 is: 98,678.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,206.90 : 172,845.41 = 71,481.56 : x
  2. Step 2: Convert to fraction form
    125,206.90/172,845.41 = 71,481.56/x
  3. Step 3: Cross multiply
    125,206.90x = 172,845.41 × 71,481.56
  4. Step 4: Simplify right side
    125,206.90x = 12,355,258,324.00
  5. Step 5: Solve for x
    x = 12,355,258,324.00/125,206.90
  6. Step 6: Final answer
    x = 98,678.74

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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.