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Finding the Fourth Proportional to 216,578.80, 324,868.20 and 164,090.80

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Solution

The fourth proportional to 216,578.80, 324,868.20 and 164,090.80 is: 246,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,578.80 : 324,868.20 = 164,090.80 : x
  2. Step 2: Convert to fraction form
    216,578.80/324,868.20 = 164,090.80/x
  3. Step 3: Cross multiply
    216,578.80x = 324,868.20 × 164,090.80
  4. Step 4: Simplify right side
    216,578.80x = 53,307,882,832.56
  5. Step 5: Solve for x
    x = 53,307,882,832.56/216,578.80
  6. Step 6: Final answer
    x = 246,136.20

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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.