Home / 131,064.90-196,743.15-81,201.30

Finding the Fourth Proportional to 131,064.90, 196,743.15 and 81,201.30

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Solution

The fourth proportional to 131,064.90, 196,743.15 and 81,201.30 is: 121,892.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,064.90 : 196,743.15 = 81,201.30 : x
  2. Step 2: Convert to fraction form
    131,064.90/196,743.15 = 81,201.30/x
  3. Step 3: Cross multiply
    131,064.90x = 196,743.15 × 81,201.30
  4. Step 4: Simplify right side
    131,064.90x = 15,975,799,546.10
  5. Step 5: Solve for x
    x = 15,975,799,546.10/131,064.90
  6. Step 6: Final answer
    x = 121,892.28

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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.