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Finding the Fourth Proportional to 217,759.52, 326,766.24 and 91,389.08

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Solution

The fourth proportional to 217,759.52, 326,766.24 and 91,389.08 is: 137,136.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,759.52 : 326,766.24 = 91,389.08 : x
  2. Step 2: Convert to fraction form
    217,759.52/326,766.24 = 91,389.08/x
  3. Step 3: Cross multiply
    217,759.52x = 326,766.24 × 91,389.08
  4. Step 4: Simplify right side
    217,759.52x = 29,862,866,048.66
  5. Step 5: Solve for x
    x = 29,862,866,048.66/217,759.52
  6. Step 6: Final answer
    x = 137,136.90

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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.