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Finding the Fourth Proportional to 133,721.30, 200,679.15 and 54,892.10

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Solution

The fourth proportional to 133,721.30, 200,679.15 and 54,892.10 is: 82,378.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,721.30 : 200,679.15 = 54,892.10 : x
  2. Step 2: Convert to fraction form
    133,721.30/200,679.15 = 54,892.10/x
  3. Step 3: Cross multiply
    133,721.30x = 200,679.15 × 54,892.10
  4. Step 4: Simplify right side
    133,721.30x = 11,015,699,969.72
  5. Step 5: Solve for x
    x = 11,015,699,969.72/133,721.30
  6. Step 6: Final answer
    x = 82,378.05

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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.