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Finding the Fourth Proportional to 217,872.70, 326,566.05 and 84,708.70

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Solution

The fourth proportional to 217,872.70, 326,566.05 and 84,708.70 is: 126,968.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,872.70 : 326,566.05 = 84,708.70 : x
  2. Step 2: Convert to fraction form
    217,872.70/326,566.05 = 84,708.70/x
  3. Step 3: Cross multiply
    217,872.70x = 326,566.05 × 84,708.70
  4. Step 4: Simplify right side
    217,872.70x = 27,662,985,559.64
  5. Step 5: Solve for x
    x = 27,662,985,559.64/217,872.70
  6. Step 6: Final answer
    x = 126,968.57

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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.