Home / 90,997.68-136,507.44-86,021.04

Finding the Fourth Proportional to 90,997.68, 136,507.44 and 86,021.04

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Solution

The fourth proportional to 90,997.68, 136,507.44 and 86,021.04 is: 129,041.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,997.68 : 136,507.44 = 86,021.04 : x
  2. Step 2: Convert to fraction form
    90,997.68/136,507.44 = 86,021.04/x
  3. Step 3: Cross multiply
    90,997.68x = 136,507.44 × 86,021.04
  4. Step 4: Simplify right side
    90,997.68x = 11,742,511,956.54
  5. Step 5: Solve for x
    x = 11,742,511,956.54/90,997.68
  6. Step 6: Final answer
    x = 129,041.88

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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.