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Finding the Fourth Proportional to 152.29, 228.45 and 80.15

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Solution

The fourth proportional to 152.29, 228.45 and 80.15 is: 120.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.29 : 228.45 = 80.15 : x
  2. Step 2: Convert to fraction form
    152.29/228.45 = 80.15/x
  3. Step 3: Cross multiply
    152.29x = 228.45 × 80.15
  4. Step 4: Simplify right side
    152.29x = 18,310.27
  5. Step 5: Solve for x
    x = 18,310.27/152.29
  6. Step 6: Final answer
    x = 120.24

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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.