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Finding the Fourth Proportional to 111,809.90, 167,716.22 and 61,987.30

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Solution

The fourth proportional to 111,809.90, 167,716.22 and 61,987.30 is: 92,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,809.90 : 167,716.22 = 61,987.30 : x
  2. Step 2: Convert to fraction form
    111,809.90/167,716.22 = 61,987.30/x
  3. Step 3: Cross multiply
    111,809.90x = 167,716.22 × 61,987.30
  4. Step 4: Simplify right side
    111,809.90x = 10,396,274,914.78
  5. Step 5: Solve for x
    x = 10,396,274,914.78/111,809.90
  6. Step 6: Final answer
    x = 92,981.70

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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.