Home / 100,781.66-139,084.44-57,768.31

Finding the Fourth Proportional to 100,781.66, 139,084.44 and 57,768.31

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Solution

The fourth proportional to 100,781.66, 139,084.44 and 57,768.31 is: 79,723.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,781.66 : 139,084.44 = 57,768.31 : x
  2. Step 2: Convert to fraction form
    100,781.66/139,084.44 = 57,768.31/x
  3. Step 3: Cross multiply
    100,781.66x = 139,084.44 × 57,768.31
  4. Step 4: Simplify right side
    100,781.66x = 8,034,672,757.25
  5. Step 5: Solve for x
    x = 8,034,672,757.25/100,781.66
  6. Step 6: Final answer
    x = 79,723.56

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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.