Home / 57,138.26-78,839.60-31,643.40

Finding the Fourth Proportional to 57,138.26, 78,839.60 and 31,643.40

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Solution

The fourth proportional to 57,138.26, 78,839.60 and 31,643.40 is: 43,661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,138.26 : 78,839.60 = 31,643.40 : x
  2. Step 2: Convert to fraction form
    57,138.26/78,839.60 = 31,643.40/x
  3. Step 3: Cross multiply
    57,138.26x = 78,839.60 × 31,643.40
  4. Step 4: Simplify right side
    57,138.26x = 2,494,752,998.64
  5. Step 5: Solve for x
    x = 2,494,752,998.64/57,138.26
  6. Step 6: Final answer
    x = 43,661.69

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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.