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Finding the Fourth Proportional to 76,136.80, 114,212.40 and 20,732.80

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Solution

The fourth proportional to 76,136.80, 114,212.40 and 20,732.80 is: 31,101.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,136.80 : 114,212.40 = 20,732.80 : x
  2. Step 2: Convert to fraction form
    76,136.80/114,212.40 = 20,732.80/x
  3. Step 3: Cross multiply
    76,136.80x = 114,212.40 × 20,732.80
  4. Step 4: Simplify right side
    76,136.80x = 2,367,942,846.72
  5. Step 5: Solve for x
    x = 2,367,942,846.72/76,136.80
  6. Step 6: Final answer
    x = 31,101.16

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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.