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Finding the Fourth Proportional to 203,927.20, 305,890.80 and 133,068.40

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Solution

The fourth proportional to 203,927.20, 305,890.80 and 133,068.40 is: 199,602.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,927.20 : 305,890.80 = 133,068.40 : x
  2. Step 2: Convert to fraction form
    203,927.20/305,890.80 = 133,068.40/x
  3. Step 3: Cross multiply
    203,927.20x = 305,890.80 × 133,068.40
  4. Step 4: Simplify right side
    203,927.20x = 40,704,399,330.72
  5. Step 5: Solve for x
    x = 40,704,399,330.72/203,927.20
  6. Step 6: Final answer
    x = 199,602.60

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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.