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Finding the Fourth Proportional to 114.26, 157.70 and 74.91

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Solution

The fourth proportional to 114.26, 157.70 and 74.91 is: 103.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.26 : 157.70 = 74.91 : x
  2. Step 2: Convert to fraction form
    114.26/157.70 = 74.91/x
  3. Step 3: Cross multiply
    114.26x = 157.70 × 74.91
  4. Step 4: Simplify right side
    114.26x = 11,813.31
  5. Step 5: Solve for x
    x = 11,813.31/114.26
  6. Step 6: Final answer
    x = 103.39

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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.