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Finding the Fourth Proportional to 57,720.66, 86,593.97 and 20,283.32

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Solution

The fourth proportional to 57,720.66, 86,593.97 and 20,283.32 is: 30,429.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,720.66 : 86,593.97 = 20,283.32 : x
  2. Step 2: Convert to fraction form
    57,720.66/86,593.97 = 20,283.32/x
  3. Step 3: Cross multiply
    57,720.66x = 86,593.97 × 20,283.32
  4. Step 4: Simplify right side
    57,720.66x = 1,756,413,470.77
  5. Step 5: Solve for x
    x = 1,756,413,470.77/57,720.66
  6. Step 6: Final answer
    x = 30,429.55

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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.