Home / 111,979.40-167,969.10-80,486.60

Finding the Fourth Proportional to 111,979.40, 167,969.10 and 80,486.60

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Solution

The fourth proportional to 111,979.40, 167,969.10 and 80,486.60 is: 120,729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,979.40 : 167,969.10 = 80,486.60 : x
  2. Step 2: Convert to fraction form
    111,979.40/167,969.10 = 80,486.60/x
  3. Step 3: Cross multiply
    111,979.40x = 167,969.10 × 80,486.60
  4. Step 4: Simplify right side
    111,979.40x = 13,519,261,764.06
  5. Step 5: Solve for x
    x = 13,519,261,764.06/111,979.40
  6. Step 6: Final answer
    x = 120,729.90

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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.