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Finding the Fourth Proportional to 111,640.80, 167,315.40 and 80,439.60

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Solution

The fourth proportional to 111,640.80, 167,315.40 and 80,439.60 is: 120,554.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,640.80 : 167,315.40 = 80,439.60 : x
  2. Step 2: Convert to fraction form
    111,640.80/167,315.40 = 80,439.60/x
  3. Step 3: Cross multiply
    111,640.80x = 167,315.40 × 80,439.60
  4. Step 4: Simplify right side
    111,640.80x = 13,458,783,849.84
  5. Step 5: Solve for x
    x = 13,458,783,849.84/111,640.80
  6. Step 6: Final answer
    x = 120,554.35

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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.