Home / 81,819.82-112,912.88-47,831.21

Finding the Fourth Proportional to 81,819.82, 112,912.88 and 47,831.21

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Solution

The fourth proportional to 81,819.82, 112,912.88 and 47,831.21 is: 66,007.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,819.82 : 112,912.88 = 47,831.21 : x
  2. Step 2: Convert to fraction form
    81,819.82/112,912.88 = 47,831.21/x
  3. Step 3: Cross multiply
    81,819.82x = 112,912.88 × 47,831.21
  4. Step 4: Simplify right side
    81,819.82x = 5,400,759,674.98
  5. Step 5: Solve for x
    x = 5,400,759,674.98/81,819.82
  6. Step 6: Final answer
    x = 66,007.96

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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.