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Finding the Fourth Proportional to 29,121.39, 40,134.21 and 21,149.76

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Solution

The fourth proportional to 29,121.39, 40,134.21 and 21,149.76 is: 29,147.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,121.39 : 40,134.21 = 21,149.76 : x
  2. Step 2: Convert to fraction form
    29,121.39/40,134.21 = 21,149.76/x
  3. Step 3: Cross multiply
    29,121.39x = 40,134.21 × 21,149.76
  4. Step 4: Simplify right side
    29,121.39x = 848,828,909.29
  5. Step 5: Solve for x
    x = 848,828,909.29/29,121.39
  6. Step 6: Final answer
    x = 29,147.95

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.