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Finding the Fourth Proportional to 133,356.30, 200,143.80 and 128,982.30

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Solution

The fourth proportional to 133,356.30, 200,143.80 and 128,982.30 is: 193,579.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,356.30 : 200,143.80 = 128,982.30 : x
  2. Step 2: Convert to fraction form
    133,356.30/200,143.80 = 128,982.30/x
  3. Step 3: Cross multiply
    133,356.30x = 200,143.80 × 128,982.30
  4. Step 4: Simplify right side
    133,356.30x = 25,815,007,654.74
  5. Step 5: Solve for x
    x = 25,815,007,654.74/133,356.30
  6. Step 6: Final answer
    x = 193,579.21

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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.