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Finding the Fourth Proportional to 157, 235.34 and 65.75

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Solution

The fourth proportional to 157, 235.34 and 65.75 is: 98.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    157 : 235.34 = 65.75 : x
  2. Step 2: Convert to fraction form
    157/235.34 = 65.75/x
  3. Step 3: Cross multiply
    157x = 235.34 × 65.75
  4. Step 4: Simplify right side
    157x = 15,473.61
  5. Step 5: Solve for x
    x = 15,473.61/157
  6. Step 6: Final answer
    x = 98.56

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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.