Home / 81,640.17-122,467.95-31,724.12

Finding the Fourth Proportional to 81,640.17, 122,467.95 and 31,724.12

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Solution

The fourth proportional to 81,640.17, 122,467.95 and 31,724.12 is: 47,589.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,640.17 : 122,467.95 = 31,724.12 : x
  2. Step 2: Convert to fraction form
    81,640.17/122,467.95 = 31,724.12/x
  3. Step 3: Cross multiply
    81,640.17x = 122,467.95 × 31,724.12
  4. Step 4: Simplify right side
    81,640.17x = 3,885,188,248.12
  5. Step 5: Solve for x
    x = 3,885,188,248.12/81,640.17
  6. Step 6: Final answer
    x = 47,589.17

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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.