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Finding the Fourth Proportional to 111,839.88, 167,619.47 and 66,894.47

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Solution

The fourth proportional to 111,839.88, 167,619.47 and 66,894.47 is: 100,257.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,839.88 : 167,619.47 = 66,894.47 : x
  2. Step 2: Convert to fraction form
    111,839.88/167,619.47 = 66,894.47/x
  3. Step 3: Cross multiply
    111,839.88x = 167,619.47 × 66,894.47
  4. Step 4: Simplify right side
    111,839.88x = 11,212,814,434.76
  5. Step 5: Solve for x
    x = 11,212,814,434.76/111,839.88
  6. Step 6: Final answer
    x = 100,257.75

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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.