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Finding the Fourth Proportional to 91,568.76, 126,372.92 and 51,281.88

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Solution

The fourth proportional to 91,568.76, 126,372.92 and 51,281.88 is: 70,773.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,568.76 : 126,372.92 = 51,281.88 : x
  2. Step 2: Convert to fraction form
    91,568.76/126,372.92 = 51,281.88/x
  3. Step 3: Cross multiply
    91,568.76x = 126,372.92 × 51,281.88
  4. Step 4: Simplify right side
    91,568.76x = 6,480,640,918.69
  5. Step 5: Solve for x
    x = 6,480,640,918.69/91,568.76
  6. Step 6: Final answer
    x = 70,773.49

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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.