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Finding the Fourth Proportional to 217,778.54, 300,481.79 and 127,082.72

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Solution

The fourth proportional to 217,778.54, 300,481.79 and 127,082.72 is: 175,343.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,778.54 : 300,481.79 = 127,082.72 : x
  2. Step 2: Convert to fraction form
    217,778.54/300,481.79 = 127,082.72/x
  3. Step 3: Cross multiply
    217,778.54x = 300,481.79 × 127,082.72
  4. Step 4: Simplify right side
    217,778.54x = 38,186,043,299.46
  5. Step 5: Solve for x
    x = 38,186,043,299.46/217,778.54
  6. Step 6: Final answer
    x = 175,343.47

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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.