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Finding the Fourth Proportional to 111,992.40, 167,502.60 and 100,231.20

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Solution

The fourth proportional to 111,992.40, 167,502.60 and 100,231.20 is: 149,911.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,992.40 : 167,502.60 = 100,231.20 : x
  2. Step 2: Convert to fraction form
    111,992.40/167,502.60 = 100,231.20/x
  3. Step 3: Cross multiply
    111,992.40x = 167,502.60 × 100,231.20
  4. Step 4: Simplify right side
    111,992.40x = 16,788,986,601.12
  5. Step 5: Solve for x
    x = 16,788,986,601.12/111,992.40
  6. Step 6: Final answer
    x = 149,911.84

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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.