Home / 57,721.23-86,586.78-20,278.05

Finding the Fourth Proportional to 57,721.23, 86,586.78 and 20,278.05

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Solution

The fourth proportional to 57,721.23, 86,586.78 and 20,278.05 is: 30,418.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,721.23 : 86,586.78 = 20,278.05 : x
  2. Step 2: Convert to fraction form
    57,721.23/86,586.78 = 20,278.05/x
  3. Step 3: Cross multiply
    57,721.23x = 86,586.78 × 20,278.05
  4. Step 4: Simplify right side
    57,721.23x = 1,755,811,054.18
  5. Step 5: Solve for x
    x = 1,755,811,054.18/57,721.23
  6. Step 6: Final answer
    x = 30,418.81

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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.