Home / 81,981.21-122,976.26-25,825.74

Finding the Fourth Proportional to 81,981.21, 122,976.26 and 25,825.74

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Solution

The fourth proportional to 81,981.21, 122,976.26 and 25,825.74 is: 38,740.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.21 : 122,976.26 = 25,825.74 : x
  2. Step 2: Convert to fraction form
    81,981.21/122,976.26 = 25,825.74/x
  3. Step 3: Cross multiply
    81,981.21x = 122,976.26 × 25,825.74
  4. Step 4: Simplify right side
    81,981.21x = 3,175,952,787.80
  5. Step 5: Solve for x
    x = 3,175,952,787.80/81,981.21
  6. Step 6: Final answer
    x = 38,740.01

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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.