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Finding the Fourth Proportional to 114.53, 158.28 and 103.55

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Solution

The fourth proportional to 114.53, 158.28 and 103.55 is: 143.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.53 : 158.28 = 103.55 : x
  2. Step 2: Convert to fraction form
    114.53/158.28 = 103.55/x
  3. Step 3: Cross multiply
    114.53x = 158.28 × 103.55
  4. Step 4: Simplify right side
    114.53x = 16,389.89
  5. Step 5: Solve for x
    x = 16,389.89/114.53
  6. Step 6: Final answer
    x = 143.11

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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.