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Finding the Fourth Proportional to 111,354.40, 166,812.90 and 103,481.20

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Solution

The fourth proportional to 111,354.40, 166,812.90 and 103,481.20 is: 155,018.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,354.40 : 166,812.90 = 103,481.20 : x
  2. Step 2: Convert to fraction form
    111,354.40/166,812.90 = 103,481.20/x
  3. Step 3: Cross multiply
    111,354.40x = 166,812.90 × 103,481.20
  4. Step 4: Simplify right side
    111,354.40x = 17,261,999,067.48
  5. Step 5: Solve for x
    x = 17,261,999,067.48/111,354.40
  6. Step 6: Final answer
    x = 155,018.56

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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.