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Finding the Fourth Proportional to 111,324.49, 166,989.17 and 66,988.33

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Solution

The fourth proportional to 111,324.49, 166,989.17 and 66,988.33 is: 100,483.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,324.49 : 166,989.17 = 66,988.33 : x
  2. Step 2: Convert to fraction form
    111,324.49/166,989.17 = 66,988.33/x
  3. Step 3: Cross multiply
    111,324.49x = 166,989.17 × 66,988.33
  4. Step 4: Simplify right side
    111,324.49x = 11,186,325,291.44
  5. Step 5: Solve for x
    x = 11,186,325,291.44/111,324.49
  6. Step 6: Final answer
    x = 100,483.96

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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.