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Finding the Fourth Proportional to 45,414.40, 68,105.40 and 18,749.20

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Solution

The fourth proportional to 45,414.40, 68,105.40 and 18,749.20 is: 28,117.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,414.40 : 68,105.40 = 18,749.20 : x
  2. Step 2: Convert to fraction form
    45,414.40/68,105.40 = 18,749.20/x
  3. Step 3: Cross multiply
    45,414.40x = 68,105.40 × 18,749.20
  4. Step 4: Simplify right side
    45,414.40x = 1,276,921,765.68
  5. Step 5: Solve for x
    x = 1,276,921,765.68/45,414.40
  6. Step 6: Final answer
    x = 28,117.11

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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.