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Finding the Fourth Proportional to 217,750.92, 300,520.40 and 127,129.16

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Solution

The fourth proportional to 217,750.92, 300,520.40 and 127,129.16 is: 175,452.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,750.92 : 300,520.40 = 127,129.16 : x
  2. Step 2: Convert to fraction form
    217,750.92/300,520.40 = 127,129.16/x
  3. Step 3: Cross multiply
    217,750.92x = 300,520.40 × 127,129.16
  4. Step 4: Simplify right side
    217,750.92x = 38,204,906,014.86
  5. Step 5: Solve for x
    x = 38,204,906,014.86/217,750.92
  6. Step 6: Final answer
    x = 175,452.33

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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.