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Finding the Fourth Proportional to 91,951.20, 126,884.88 and 51,661.80

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Solution

The fourth proportional to 91,951.20, 126,884.88 and 51,661.80 is: 71,288.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,951.20 : 126,884.88 = 51,661.80 : x
  2. Step 2: Convert to fraction form
    91,951.20/126,884.88 = 51,661.80/x
  3. Step 3: Cross multiply
    91,951.20x = 126,884.88 × 51,661.80
  4. Step 4: Simplify right side
    91,951.20x = 6,555,101,293.58
  5. Step 5: Solve for x
    x = 6,555,101,293.58/91,951.20
  6. Step 6: Final answer
    x = 71,288.92

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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.