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Finding the Fourth Proportional to 91,515.66, 126,291.66 and 51,229.50

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Solution

The fourth proportional to 91,515.66, 126,291.66 and 51,229.50 is: 70,696.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,515.66 : 126,291.66 = 51,229.50 : x
  2. Step 2: Convert to fraction form
    91,515.66/126,291.66 = 51,229.50/x
  3. Step 3: Cross multiply
    91,515.66x = 126,291.66 × 51,229.50
  4. Step 4: Simplify right side
    91,515.66x = 6,469,858,595.97
  5. Step 5: Solve for x
    x = 6,469,858,595.97/91,515.66
  6. Step 6: Final answer
    x = 70,696.74

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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.