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Finding the Fourth Proportional to 201,978.20, 302,772.90 and 156,974.60

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Solution

The fourth proportional to 201,978.20, 302,772.90 and 156,974.60 is: 235,310.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,978.20 : 302,772.90 = 156,974.60 : x
  2. Step 2: Convert to fraction form
    201,978.20/302,772.90 = 156,974.60/x
  3. Step 3: Cross multiply
    201,978.20x = 302,772.90 × 156,974.60
  4. Step 4: Simplify right side
    201,978.20x = 47,527,654,868.34
  5. Step 5: Solve for x
    x = 47,527,654,868.34/201,978.20
  6. Step 6: Final answer
    x = 235,310.82

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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.