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Finding the Fourth Proportional to 131,010.55, 196,663.65 and 86,723.80

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Solution

The fourth proportional to 131,010.55, 196,663.65 and 86,723.80 is: 130,183.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,010.55 : 196,663.65 = 86,723.80 : x
  2. Step 2: Convert to fraction form
    131,010.55/196,663.65 = 86,723.80/x
  3. Step 3: Cross multiply
    131,010.55x = 196,663.65 × 86,723.80
  4. Step 4: Simplify right side
    131,010.55x = 17,055,419,049.87
  5. Step 5: Solve for x
    x = 17,055,419,049.87/131,010.55
  6. Step 6: Final answer
    x = 130,183.55

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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.