Home / 131,242.20-196,863.30-81,159.90

Finding the Fourth Proportional to 131,242.20, 196,863.30 and 81,159.90

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Solution

The fourth proportional to 131,242.20, 196,863.30 and 81,159.90 is: 121,739.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,242.20 : 196,863.30 = 81,159.90 : x
  2. Step 2: Convert to fraction form
    131,242.20/196,863.30 = 81,159.90/x
  3. Step 3: Cross multiply
    131,242.20x = 196,863.30 × 81,159.90
  4. Step 4: Simplify right side
    131,242.20x = 15,977,405,741.67
  5. Step 5: Solve for x
    x = 15,977,405,741.67/131,242.20
  6. Step 6: Final answer
    x = 121,739.85

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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.