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Finding the Fourth Proportional to 90,189.92, 124,512.18 and 54,389

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Solution

The fourth proportional to 90,189.92, 124,512.18 and 54,389 is: 75,087.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,189.92 : 124,512.18 = 54,389 : x
  2. Step 2: Convert to fraction form
    90,189.92/124,512.18 = 54,389/x
  3. Step 3: Cross multiply
    90,189.92x = 124,512.18 × 54,389
  4. Step 4: Simplify right side
    90,189.92x = 6,772,092,958.02
  5. Step 5: Solve for x
    x = 6,772,092,958.02/90,189.92
  6. Step 6: Final answer
    x = 75,087.03

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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.