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Finding the Fourth Proportional to 152.94, 211.05 and 108.78

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Solution

The fourth proportional to 152.94, 211.05 and 108.78 is: 150.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.94 : 211.05 = 108.78 : x
  2. Step 2: Convert to fraction form
    152.94/211.05 = 108.78/x
  3. Step 3: Cross multiply
    152.94x = 211.05 × 108.78
  4. Step 4: Simplify right side
    152.94x = 22,958.02
  5. Step 5: Solve for x
    x = 22,958.02/152.94
  6. Step 6: Final answer
    x = 150.11

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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.