Home / 81,781.33-122,671.84-25,625.74

Finding the Fourth Proportional to 81,781.33, 122,671.84 and 25,625.74

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Solution

The fourth proportional to 81,781.33, 122,671.84 and 25,625.74 is: 38,438.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,781.33 : 122,671.84 = 25,625.74 : x
  2. Step 2: Convert to fraction form
    81,781.33/122,671.84 = 25,625.74/x
  3. Step 3: Cross multiply
    81,781.33x = 122,671.84 × 25,625.74
  4. Step 4: Simplify right side
    81,781.33x = 3,143,557,001.56
  5. Step 5: Solve for x
    x = 3,143,557,001.56/81,781.33
  6. Step 6: Final answer
    x = 38,438.57

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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.