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Finding the Fourth Proportional to 111,999.67, 167,915.01 and 67,615.87

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Solution

The fourth proportional to 111,999.67, 167,915.01 and 67,615.87 is: 101,372.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,999.67 : 167,915.01 = 67,615.87 : x
  2. Step 2: Convert to fraction form
    111,999.67/167,915.01 = 67,615.87/x
  3. Step 3: Cross multiply
    111,999.67x = 167,915.01 × 67,615.87
  4. Step 4: Simplify right side
    111,999.67x = 11,353,719,487.21
  5. Step 5: Solve for x
    x = 11,353,719,487.21/111,999.67
  6. Step 6: Final answer
    x = 101,372.79

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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.