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Finding the Fourth Proportional to 57,373.21, 86,046.81 and 21,821.80

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Solution

The fourth proportional to 57,373.21, 86,046.81 and 21,821.80 is: 32,727.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,373.21 : 86,046.81 = 21,821.80 : x
  2. Step 2: Convert to fraction form
    57,373.21/86,046.81 = 21,821.80/x
  3. Step 3: Cross multiply
    57,373.21x = 86,046.81 × 21,821.80
  4. Step 4: Simplify right side
    57,373.21x = 1,877,696,278.46
  5. Step 5: Solve for x
    x = 1,877,696,278.46/57,373.21
  6. Step 6: Final answer
    x = 32,727.75

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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.