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Finding the Fourth Proportional to 135,651.20, 203,476.80 and 129,892.10

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Solution

The fourth proportional to 135,651.20, 203,476.80 and 129,892.10 is: 194,838.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,651.20 : 203,476.80 = 129,892.10 : x
  2. Step 2: Convert to fraction form
    135,651.20/203,476.80 = 129,892.10/x
  3. Step 3: Cross multiply
    135,651.20x = 203,476.80 × 129,892.10
  4. Step 4: Simplify right side
    135,651.20x = 26,430,028,853.28
  5. Step 5: Solve for x
    x = 26,430,028,853.28/135,651.20
  6. Step 6: Final answer
    x = 194,838.15

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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.