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Finding the Fourth Proportional to 91,761.48, 126,619.47 and 51,469.65

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Solution

The fourth proportional to 91,761.48, 126,619.47 and 51,469.65 is: 71,021.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,761.48 : 126,619.47 = 51,469.65 : x
  2. Step 2: Convert to fraction form
    91,761.48/126,619.47 = 51,469.65/x
  3. Step 3: Cross multiply
    91,761.48x = 126,619.47 × 51,469.65
  4. Step 4: Simplify right side
    91,761.48x = 6,517,059,804.09
  5. Step 5: Solve for x
    x = 6,517,059,804.09/91,761.48
  6. Step 6: Final answer
    x = 71,021.74

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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.