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Finding the Fourth Proportional to 135,910.90, 203,866.35 and 129,349.90

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Solution

The fourth proportional to 135,910.90, 203,866.35 and 129,349.90 is: 194,024.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,910.90 : 203,866.35 = 129,349.90 : x
  2. Step 2: Convert to fraction form
    135,910.90/203,866.35 = 129,349.90/x
  3. Step 3: Cross multiply
    135,910.90x = 203,866.35 × 129,349.90
  4. Step 4: Simplify right side
    135,910.90x = 26,370,091,985.87
  5. Step 5: Solve for x
    x = 26,370,091,985.87/135,910.90
  6. Step 6: Final answer
    x = 194,024.85

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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.