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Finding the Fourth Proportional to 111,939.42, 154,472.73 and 66,606.96

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Solution

The fourth proportional to 111,939.42, 154,472.73 and 66,606.96 is: 91,915.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.42 : 154,472.73 = 66,606.96 : x
  2. Step 2: Convert to fraction form
    111,939.42/154,472.73 = 66,606.96/x
  3. Step 3: Cross multiply
    111,939.42x = 154,472.73 × 66,606.96
  4. Step 4: Simplify right side
    111,939.42x = 10,288,958,948.20
  5. Step 5: Solve for x
    x = 10,288,958,948.20/111,939.42
  6. Step 6: Final answer
    x = 91,915.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.