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Finding the Fourth Proportional to 111,884.60, 168,021.30 and 108,385.40

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Solution

The fourth proportional to 111,884.60, 168,021.30 and 108,385.40 is: 162,766.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,884.60 : 168,021.30 = 108,385.40 : x
  2. Step 2: Convert to fraction form
    111,884.60/168,021.30 = 108,385.40/x
  3. Step 3: Cross multiply
    111,884.60x = 168,021.30 × 108,385.40
  4. Step 4: Simplify right side
    111,884.60x = 18,211,055,809.02
  5. Step 5: Solve for x
    x = 18,211,055,809.02/111,884.60
  6. Step 6: Final answer
    x = 162,766.42

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1.5x scale

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.