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Finding the Fourth Proportional to 217,336.78, 325,977.48 and 84,125.90

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Solution

The fourth proportional to 217,336.78, 325,977.48 and 84,125.90 is: 126,178.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,336.78 : 325,977.48 = 84,125.90 : x
  2. Step 2: Convert to fraction form
    217,336.78/325,977.48 = 84,125.90/x
  3. Step 3: Cross multiply
    217,336.78x = 325,977.48 × 84,125.90
  4. Step 4: Simplify right side
    217,336.78x = 27,423,148,884.73
  5. Step 5: Solve for x
    x = 27,423,148,884.73/217,336.78
  6. Step 6: Final answer
    x = 126,178.13

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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.