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Finding the Fourth Proportional to 114.21, 170.57 and 98.91

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Solution

The fourth proportional to 114.21, 170.57 and 98.91 is: 147.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.21 : 170.57 = 98.91 : x
  2. Step 2: Convert to fraction form
    114.21/170.57 = 98.91/x
  3. Step 3: Cross multiply
    114.21x = 170.57 × 98.91
  4. Step 4: Simplify right side
    114.21x = 16,871.33
  5. Step 5: Solve for x
    x = 16,871.33/114.21
  6. Step 6: Final answer
    x = 147.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.