Home / 81,441-122,716.28-66,973.96

Finding the Fourth Proportional to 81,441, 122,716.28 and 66,973.96

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Solution

The fourth proportional to 81,441, 122,716.28 and 66,973.96 is: 100,917.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,441 : 122,716.28 = 66,973.96 : x
  2. Step 2: Convert to fraction form
    81,441/122,716.28 = 66,973.96/x
  3. Step 3: Cross multiply
    81,441x = 122,716.28 × 66,973.96
  4. Step 4: Simplify right side
    81,441x = 8,218,795,228.07
  5. Step 5: Solve for x
    x = 8,218,795,228.07/81,441
  6. Step 6: Final answer
    x = 100,917.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.