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Finding the Fourth Proportional to 155, 214.06 and 108.92

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Solution

The fourth proportional to 155, 214.06 and 108.92 is: 150.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    155 : 214.06 = 108.92 : x
  2. Step 2: Convert to fraction form
    155/214.06 = 108.92/x
  3. Step 3: Cross multiply
    155x = 214.06 × 108.92
  4. Step 4: Simplify right side
    155x = 23,315.42
  5. Step 5: Solve for x
    x = 23,315.42/155
  6. Step 6: Final answer
    x = 150.42

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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.