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Finding the Fourth Proportional to 57,888.74, 86,843.43 and 20,470.53

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Solution

The fourth proportional to 57,888.74, 86,843.43 and 20,470.53 is: 30,709.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,888.74 : 86,843.43 = 20,470.53 : x
  2. Step 2: Convert to fraction form
    57,888.74/86,843.43 = 20,470.53/x
  3. Step 3: Cross multiply
    57,888.74x = 86,843.43 × 20,470.53
  4. Step 4: Simplify right side
    57,888.74x = 1,777,731,039.12
  5. Step 5: Solve for x
    x = 1,777,731,039.12/57,888.74
  6. Step 6: Final answer
    x = 30,709.44

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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.