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Finding the Fourth Proportional to 65,648.56, 90,366.96 and 57,250.48

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Solution

The fourth proportional to 65,648.56, 90,366.96 and 57,250.48 is: 78,806.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,648.56 : 90,366.96 = 57,250.48 : x
  2. Step 2: Convert to fraction form
    65,648.56/90,366.96 = 57,250.48/x
  3. Step 3: Cross multiply
    65,648.56x = 90,366.96 × 57,250.48
  4. Step 4: Simplify right side
    65,648.56x = 5,173,551,836.14
  5. Step 5: Solve for x
    x = 5,173,551,836.14/65,648.56
  6. Step 6: Final answer
    x = 78,806.78

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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.