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Finding the Fourth Proportional to 114.19, 157.67 and 74.87

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Solution

The fourth proportional to 114.19, 157.67 and 74.87 is: 103.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.19 : 157.67 = 74.87 : x
  2. Step 2: Convert to fraction form
    114.19/157.67 = 74.87/x
  3. Step 3: Cross multiply
    114.19x = 157.67 × 74.87
  4. Step 4: Simplify right side
    114.19x = 11,804.38
  5. Step 5: Solve for x
    x = 11,804.38/114.19
  6. Step 6: Final answer
    x = 103.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.