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Finding the Fourth Proportional to 111,429.90, 167,145.21 and 28,323.90

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Solution

The fourth proportional to 111,429.90, 167,145.21 and 28,323.90 is: 42,485.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,429.90 : 167,145.21 = 28,323.90 : x
  2. Step 2: Convert to fraction form
    111,429.90/167,145.21 = 28,323.90/x
  3. Step 3: Cross multiply
    111,429.90x = 167,145.21 × 28,323.90
  4. Step 4: Simplify right side
    111,429.90x = 4,734,204,213.52
  5. Step 5: Solve for x
    x = 4,734,204,213.52/111,429.90
  6. Step 6: Final answer
    x = 42,485.94

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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.