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Finding the Fourth Proportional to 111,931.80, 168,027.30 and 67,608.60

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Solution

The fourth proportional to 111,931.80, 168,027.30 and 67,608.60 is: 101,491.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,931.80 : 168,027.30 = 67,608.60 : x
  2. Step 2: Convert to fraction form
    111,931.80/168,027.30 = 67,608.60/x
  3. Step 3: Cross multiply
    111,931.80x = 168,027.30 × 67,608.60
  4. Step 4: Simplify right side
    111,931.80x = 11,360,090,514.78
  5. Step 5: Solve for x
    x = 11,360,090,514.78/111,931.80
  6. Step 6: Final answer
    x = 101,491.18

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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.