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Finding the Fourth Proportional to 135.86, 203.76 and 39.69

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Solution

The fourth proportional to 135.86, 203.76 and 39.69 is: 59.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.86 : 203.76 = 39.69 : x
  2. Step 2: Convert to fraction form
    135.86/203.76 = 39.69/x
  3. Step 3: Cross multiply
    135.86x = 203.76 × 39.69
  4. Step 4: Simplify right side
    135.86x = 8,087.23
  5. Step 5: Solve for x
    x = 8,087.23/135.86
  6. Step 6: Final answer
    x = 59.53

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.