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Finding the Fourth Proportional to 71,806.93, 107,726.38 and 21,890.90

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Solution

The fourth proportional to 71,806.93, 107,726.38 and 21,890.90 is: 32,841.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,806.93 : 107,726.38 = 21,890.90 : x
  2. Step 2: Convert to fraction form
    71,806.93/107,726.38 = 21,890.90/x
  3. Step 3: Cross multiply
    71,806.93x = 107,726.38 × 21,890.90
  4. Step 4: Simplify right side
    71,806.93x = 2,358,227,626.53
  5. Step 5: Solve for x
    x = 2,358,227,626.53/71,806.93
  6. Step 6: Final answer
    x = 32,841.23

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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.