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Finding the Fourth Proportional to 111,739.80, 167,480.10 and 45,136.20

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Solution

The fourth proportional to 111,739.80, 167,480.10 and 45,136.20 is: 67,651.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,739.80 : 167,480.10 = 45,136.20 : x
  2. Step 2: Convert to fraction form
    111,739.80/167,480.10 = 45,136.20/x
  3. Step 3: Cross multiply
    111,739.80x = 167,480.10 × 45,136.20
  4. Step 4: Simplify right side
    111,739.80x = 7,559,415,289.62
  5. Step 5: Solve for x
    x = 7,559,415,289.62/111,739.80
  6. Step 6: Final answer
    x = 67,651.95

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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.