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Finding the Fourth Proportional to 155.47, 214.61 and 106.27

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Solution

The fourth proportional to 155.47, 214.61 and 106.27 is: 146.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.47 : 214.61 = 106.27 : x
  2. Step 2: Convert to fraction form
    155.47/214.61 = 106.27/x
  3. Step 3: Cross multiply
    155.47x = 214.61 × 106.27
  4. Step 4: Simplify right side
    155.47x = 22,806.60
  5. Step 5: Solve for x
    x = 22,806.60/155.47
  6. Step 6: Final answer
    x = 146.69

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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.