Home / 81,781.49-122,672.08-25,625.89

Finding the Fourth Proportional to 81,781.49, 122,672.08 and 25,625.89

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Solution

The fourth proportional to 81,781.49, 122,672.08 and 25,625.89 is: 38,438.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,781.49 : 122,672.08 = 25,625.89 : x
  2. Step 2: Convert to fraction form
    81,781.49/122,672.08 = 25,625.89/x
  3. Step 3: Cross multiply
    81,781.49x = 122,672.08 × 25,625.89
  4. Step 4: Simplify right side
    81,781.49x = 3,143,581,228.15
  5. Step 5: Solve for x
    x = 3,143,581,228.15/81,781.49
  6. Step 6: Final answer
    x = 38,438.79

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1.5x scale

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.