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Finding the Fourth Proportional to 111,318.80, 166,650.15 and 73,921.10

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Solution

The fourth proportional to 111,318.80, 166,650.15 and 73,921.10 is: 110,663.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,318.80 : 166,650.15 = 73,921.10 : x
  2. Step 2: Convert to fraction form
    111,318.80/166,650.15 = 73,921.10/x
  3. Step 3: Cross multiply
    111,318.80x = 166,650.15 × 73,921.10
  4. Step 4: Simplify right side
    111,318.80x = 12,318,962,403.17
  5. Step 5: Solve for x
    x = 12,318,962,403.17/111,318.80
  6. Step 6: Final answer
    x = 110,663.81

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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.