Home / 57,021.12-78,687.84-31,872.96

Finding the Fourth Proportional to 57,021.12, 78,687.84 and 31,872.96

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Solution

The fourth proportional to 57,021.12, 78,687.84 and 31,872.96 is: 43,983.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,021.12 : 78,687.84 = 31,872.96 : x
  2. Step 2: Convert to fraction form
    57,021.12/78,687.84 = 31,872.96/x
  3. Step 3: Cross multiply
    57,021.12x = 78,687.84 × 31,872.96
  4. Step 4: Simplify right side
    57,021.12x = 2,508,014,376.81
  5. Step 5: Solve for x
    x = 2,508,014,376.81/57,021.12
  6. Step 6: Final answer
    x = 43,983.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.