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Finding the Fourth Proportional to 217,502.78, 326,148.68 and 127,574.87

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Solution

The fourth proportional to 217,502.78, 326,148.68 and 127,574.87 is: 191,300.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,502.78 : 326,148.68 = 127,574.87 : x
  2. Step 2: Convert to fraction form
    217,502.78/326,148.68 = 127,574.87/x
  3. Step 3: Cross multiply
    217,502.78x = 326,148.68 × 127,574.87
  4. Step 4: Simplify right side
    217,502.78x = 41,608,375,451.67
  5. Step 5: Solve for x
    x = 41,608,375,451.67/217,502.78
  6. Step 6: Final answer
    x = 191,300.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.