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Finding the Fourth Proportional to 217,151.61, 325,718.90 and 90,759.21

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Solution

The fourth proportional to 217,151.61, 325,718.90 and 90,759.21 is: 136,135.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,151.61 : 325,718.90 = 90,759.21 : x
  2. Step 2: Convert to fraction form
    217,151.61/325,718.90 = 90,759.21/x
  3. Step 3: Cross multiply
    217,151.61x = 325,718.90 × 90,759.21
  4. Step 4: Simplify right side
    217,151.61x = 29,561,990,046.07
  5. Step 5: Solve for x
    x = 29,561,990,046.07/217,151.61
  6. Step 6: Final answer
    x = 136,135.26

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1.5x scale

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.