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Finding the Fourth Proportional to 90,751.92, 125,204.34 and 54,928.80

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Solution

The fourth proportional to 90,751.92, 125,204.34 and 54,928.80 is: 75,781.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,751.92 : 125,204.34 = 54,928.80 : x
  2. Step 2: Convert to fraction form
    90,751.92/125,204.34 = 54,928.80/x
  3. Step 3: Cross multiply
    90,751.92x = 125,204.34 × 54,928.80
  4. Step 4: Simplify right side
    90,751.92x = 6,877,324,150.99
  5. Step 5: Solve for x
    x = 6,877,324,150.99/90,751.92
  6. Step 6: Final answer
    x = 75,781.58

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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.