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Finding the Fourth Proportional to 135.89, 203.80 and 70.92

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Solution

The fourth proportional to 135.89, 203.80 and 70.92 is: 106.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.89 : 203.80 = 70.92 : x
  2. Step 2: Convert to fraction form
    135.89/203.80 = 70.92/x
  3. Step 3: Cross multiply
    135.89x = 203.80 × 70.92
  4. Step 4: Simplify right side
    135.89x = 14,453.50
  5. Step 5: Solve for x
    x = 14,453.50/135.89
  6. Step 6: Final answer
    x = 106.36

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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.