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Finding the Fourth Proportional to 217,290.78, 325,747.71 and 84,079.35

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Solution

The fourth proportional to 217,290.78, 325,747.71 and 84,079.35 is: 126,046.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,290.78 : 325,747.71 = 84,079.35 : x
  2. Step 2: Convert to fraction form
    217,290.78/325,747.71 = 84,079.35/x
  3. Step 3: Cross multiply
    217,290.78x = 325,747.71 × 84,079.35
  4. Step 4: Simplify right side
    217,290.78x = 27,388,655,720.79
  5. Step 5: Solve for x
    x = 27,388,655,720.79/217,290.78
  6. Step 6: Final answer
    x = 126,046.10

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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.