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Finding the Fourth Proportional to 111,161.80, 166,629.30 and 54,915.40

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Solution

The fourth proportional to 111,161.80, 166,629.30 and 54,915.40 is: 82,317.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,161.80 : 166,629.30 = 54,915.40 : x
  2. Step 2: Convert to fraction form
    111,161.80/166,629.30 = 54,915.40/x
  3. Step 3: Cross multiply
    111,161.80x = 166,629.30 × 54,915.40
  4. Step 4: Simplify right side
    111,161.80x = 9,150,514,661.22
  5. Step 5: Solve for x
    x = 9,150,514,661.22/111,161.80
  6. Step 6: Final answer
    x = 82,317.08

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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.