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Finding the Fourth Proportional to 111,319.80, 166,979.70 and 90,324.60

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Solution

The fourth proportional to 111,319.80, 166,979.70 and 90,324.60 is: 135,486.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,319.80 : 166,979.70 = 90,324.60 : x
  2. Step 2: Convert to fraction form
    111,319.80/166,979.70 = 90,324.60/x
  3. Step 3: Cross multiply
    111,319.80x = 166,979.70 × 90,324.60
  4. Step 4: Simplify right side
    111,319.80x = 15,082,374,610.62
  5. Step 5: Solve for x
    x = 15,082,374,610.62/111,319.80
  6. Step 6: Final answer
    x = 135,486.90

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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.