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Finding the Fourth Proportional to 203,938.10, 305,907.15 and 133,079.30

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Solution

The fourth proportional to 203,938.10, 305,907.15 and 133,079.30 is: 199,618.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,938.10 : 305,907.15 = 133,079.30 : x
  2. Step 2: Convert to fraction form
    203,938.10/305,907.15 = 133,079.30/x
  3. Step 3: Cross multiply
    203,938.10x = 305,907.15 × 133,079.30
  4. Step 4: Simplify right side
    203,938.10x = 40,709,909,387.00
  5. Step 5: Solve for x
    x = 40,709,909,387.00/203,938.10
  6. Step 6: Final answer
    x = 199,618.95

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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.