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Finding the Fourth Proportional to 52,908.39, 79,361.72 and 21,317.69

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Solution

The fourth proportional to 52,908.39, 79,361.72 and 21,317.69 is: 31,976.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,908.39 : 79,361.72 = 21,317.69 : x
  2. Step 2: Convert to fraction form
    52,908.39/79,361.72 = 21,317.69/x
  3. Step 3: Cross multiply
    52,908.39x = 79,361.72 × 21,317.69
  4. Step 4: Simplify right side
    52,908.39x = 1,691,808,121.37
  5. Step 5: Solve for x
    x = 1,691,808,121.37/52,908.39
  6. Step 6: Final answer
    x = 31,976.18

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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.