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Finding the Fourth Proportional to 71,712.66, 107,568.92 and 21,792.62

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Solution

The fourth proportional to 71,712.66, 107,568.92 and 21,792.62 is: 32,688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,712.66 : 107,568.92 = 21,792.62 : x
  2. Step 2: Convert to fraction form
    71,712.66/107,568.92 = 21,792.62/x
  3. Step 3: Cross multiply
    71,712.66x = 107,568.92 × 21,792.62
  4. Step 4: Simplify right side
    71,712.66x = 2,344,208,597.37
  5. Step 5: Solve for x
    x = 2,344,208,597.37/71,712.66
  6. Step 6: Final answer
    x = 32,688.91

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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.