Home / 99,139.30-136,286.16-85,291.04

Finding the Fourth Proportional to 99,139.30, 136,286.16 and 85,291.04

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Solution

The fourth proportional to 99,139.30, 136,286.16 and 85,291.04 is: 117,249.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,139.30 : 136,286.16 = 85,291.04 : x
  2. Step 2: Convert to fraction form
    99,139.30/136,286.16 = 85,291.04/x
  3. Step 3: Cross multiply
    99,139.30x = 136,286.16 × 85,291.04
  4. Step 4: Simplify right side
    99,139.30x = 11,623,988,324.01
  5. Step 5: Solve for x
    x = 11,623,988,324.01/99,139.30
  6. Step 6: Final answer
    x = 117,249.05

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.