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Finding the Fourth Proportional to 79,136.80, 118,474.80 and 76,832.80

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Solution

The fourth proportional to 79,136.80, 118,474.80 and 76,832.80 is: 115,025.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,136.80 : 118,474.80 = 76,832.80 : x
  2. Step 2: Convert to fraction form
    79,136.80/118,474.80 = 76,832.80/x
  3. Step 3: Cross multiply
    79,136.80x = 118,474.80 × 76,832.80
  4. Step 4: Simplify right side
    79,136.80x = 9,102,750,613.44
  5. Step 5: Solve for x
    x = 9,102,750,613.44/79,136.80
  6. Step 6: Final answer
    x = 115,025.51

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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.