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Finding the Fourth Proportional to 152.66, 228.88 and 80.57

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Solution

The fourth proportional to 152.66, 228.88 and 80.57 is: 120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.66 : 228.88 = 80.57 : x
  2. Step 2: Convert to fraction form
    152.66/228.88 = 80.57/x
  3. Step 3: Cross multiply
    152.66x = 228.88 × 80.57
  4. Step 4: Simplify right side
    152.66x = 18,440.86
  5. Step 5: Solve for x
    x = 18,440.86/152.66
  6. Step 6: Final answer
    x = 120.80

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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.