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Finding the Fourth Proportional to 70,481.85, 105,721.40 and 17,174.13

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Solution

The fourth proportional to 70,481.85, 105,721.40 and 17,174.13 is: 25,760.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,481.85 : 105,721.40 = 17,174.13 : x
  2. Step 2: Convert to fraction form
    70,481.85/105,721.40 = 17,174.13/x
  3. Step 3: Cross multiply
    70,481.85x = 105,721.40 × 17,174.13
  4. Step 4: Simplify right side
    70,481.85x = 1,815,672,981.51
  5. Step 5: Solve for x
    x = 1,815,672,981.51/70,481.85
  6. Step 6: Final answer
    x = 25,760.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.