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Finding the Fourth Proportional to 100,250.90, 138,344.73 and 54,928.70

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Solution

The fourth proportional to 100,250.90, 138,344.73 and 54,928.70 is: 75,800.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,250.90 : 138,344.73 = 54,928.70 : x
  2. Step 2: Convert to fraction form
    100,250.90/138,344.73 = 54,928.70/x
  3. Step 3: Cross multiply
    100,250.90x = 138,344.73 × 54,928.70
  4. Step 4: Simplify right side
    100,250.90x = 7,599,096,170.75
  5. Step 5: Solve for x
    x = 7,599,096,170.75/100,250.90
  6. Step 6: Final answer
    x = 75,800.78

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1.5x scale

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.