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Finding the Fourth Proportional to 152.67, 228.73 and 80.31

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Solution

The fourth proportional to 152.67, 228.73 and 80.31 is: 120.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.67 : 228.73 = 80.31 : x
  2. Step 2: Convert to fraction form
    152.67/228.73 = 80.31/x
  3. Step 3: Cross multiply
    152.67x = 228.73 × 80.31
  4. Step 4: Simplify right side
    152.67x = 18,369.31
  5. Step 5: Solve for x
    x = 18,369.31/152.67
  6. Step 6: Final answer
    x = 120.32

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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.