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Finding the Fourth Proportional to 111,808.80, 167,842.80 and 67,485.60

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Solution

The fourth proportional to 111,808.80, 167,842.80 and 67,485.60 is: 101,306.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,808.80 : 167,842.80 = 67,485.60 : x
  2. Step 2: Convert to fraction form
    111,808.80/167,842.80 = 67,485.60/x
  3. Step 3: Cross multiply
    111,808.80x = 167,842.80 × 67,485.60
  4. Step 4: Simplify right side
    111,808.80x = 11,326,972,063.68
  5. Step 5: Solve for x
    x = 11,326,972,063.68/111,808.80
  6. Step 6: Final answer
    x = 101,306.62

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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.