Home / 100,318.89-138,439.19-54,996.05

Finding the Fourth Proportional to 100,318.89, 138,439.19 and 54,996.05

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Solution

The fourth proportional to 100,318.89, 138,439.19 and 54,996.05 is: 75,894.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,318.89 : 138,439.19 = 54,996.05 : x
  2. Step 2: Convert to fraction form
    100,318.89/138,439.19 = 54,996.05/x
  3. Step 3: Cross multiply
    100,318.89x = 138,439.19 × 54,996.05
  4. Step 4: Simplify right side
    100,318.89x = 7,613,608,615.20
  5. Step 5: Solve for x
    x = 7,613,608,615.20/100,318.89
  6. Step 6: Final answer
    x = 75,894.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.