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Finding the Fourth Proportional to 200,658.60, 300,890.70 and 111,817.80

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Solution

The fourth proportional to 200,658.60, 300,890.70 and 111,817.80 is: 167,672.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,658.60 : 300,890.70 = 111,817.80 : x
  2. Step 2: Convert to fraction form
    200,658.60/300,890.70 = 111,817.80/x
  3. Step 3: Cross multiply
    200,658.60x = 300,890.70 × 111,817.80
  4. Step 4: Simplify right side
    200,658.60x = 33,644,936,114.46
  5. Step 5: Solve for x
    x = 33,644,936,114.46/200,658.60
  6. Step 6: Final answer
    x = 167,672.53

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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.