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Finding the Fourth Proportional to 68,136.50, 102,205.02 and 18,888.50

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Solution

The fourth proportional to 68,136.50, 102,205.02 and 18,888.50 is: 28,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,136.50 : 102,205.02 = 18,888.50 : x
  2. Step 2: Convert to fraction form
    68,136.50/102,205.02 = 18,888.50/x
  3. Step 3: Cross multiply
    68,136.50x = 102,205.02 × 18,888.50
  4. Step 4: Simplify right side
    68,136.50x = 1,930,499,520.27
  5. Step 5: Solve for x
    x = 1,930,499,520.27/68,136.50
  6. Step 6: Final answer
    x = 28,332.82

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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.