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Finding the Fourth Proportional to 217,612.88, 326,381.70 and 57,689.87

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Solution

The fourth proportional to 217,612.88, 326,381.70 and 57,689.87 is: 86,524.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,612.88 : 326,381.70 = 57,689.87 : x
  2. Step 2: Convert to fraction form
    217,612.88/326,381.70 = 57,689.87/x
  3. Step 3: Cross multiply
    217,612.88x = 326,381.70 × 57,689.87
  4. Step 4: Simplify right side
    217,612.88x = 18,828,917,843.38
  5. Step 5: Solve for x
    x = 18,828,917,843.38/217,612.88
  6. Step 6: Final answer
    x = 86,524.83

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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.