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Finding the Fourth Proportional to 217,135.23, 325,706.91 and 67,380.40

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Solution

The fourth proportional to 217,135.23, 325,706.91 and 67,380.40 is: 101,071.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,135.23 : 325,706.91 = 67,380.40 : x
  2. Step 2: Convert to fraction form
    217,135.23/325,706.91 = 67,380.40/x
  3. Step 3: Cross multiply
    217,135.23x = 325,706.91 × 67,380.40
  4. Step 4: Simplify right side
    217,135.23x = 21,946,261,878.56
  5. Step 5: Solve for x
    x = 21,946,261,878.56/217,135.23
  6. Step 6: Final answer
    x = 101,071.86

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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.