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Finding the Fourth Proportional to 152.43, 228.67 and 71.28

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Solution

The fourth proportional to 152.43, 228.67 and 71.28 is: 106.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.43 : 228.67 = 71.28 : x
  2. Step 2: Convert to fraction form
    152.43/228.67 = 71.28/x
  3. Step 3: Cross multiply
    152.43x = 228.67 × 71.28
  4. Step 4: Simplify right side
    152.43x = 16,299.82
  5. Step 5: Solve for x
    x = 16,299.82/152.43
  6. Step 6: Final answer
    x = 106.93

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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.