Home / 111,986.40-167,979.60-111,208.80

Finding the Fourth Proportional to 111,986.40, 167,979.60 and 111,208.80

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Solution

The fourth proportional to 111,986.40, 167,979.60 and 111,208.80 is: 166,813.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,986.40 : 167,979.60 = 111,208.80 : x
  2. Step 2: Convert to fraction form
    111,986.40/167,979.60 = 111,208.80/x
  3. Step 3: Cross multiply
    111,986.40x = 167,979.60 × 111,208.80
  4. Step 4: Simplify right side
    111,986.40x = 18,680,809,740.48
  5. Step 5: Solve for x
    x = 18,680,809,740.48/111,986.40
  6. Step 6: Final answer
    x = 166,813.20

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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.