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Finding the Fourth Proportional to 157.11, 235.67 and 65.68

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Solution

The fourth proportional to 157.11, 235.67 and 65.68 is: 98.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.11 : 235.67 = 65.68 : x
  2. Step 2: Convert to fraction form
    157.11/235.67 = 65.68/x
  3. Step 3: Cross multiply
    157.11x = 235.67 × 65.68
  4. Step 4: Simplify right side
    157.11x = 15,478.81
  5. Step 5: Solve for x
    x = 15,478.81/157.11
  6. Step 6: Final answer
    x = 98.52

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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.