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Finding the Fourth Proportional to 109.86, 151.55 and 102.04

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Solution

The fourth proportional to 109.86, 151.55 and 102.04 is: 140.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.86 : 151.55 = 102.04 : x
  2. Step 2: Convert to fraction form
    109.86/151.55 = 102.04/x
  3. Step 3: Cross multiply
    109.86x = 151.55 × 102.04
  4. Step 4: Simplify right side
    109.86x = 15,464.35
  5. Step 5: Solve for x
    x = 15,464.35/109.86
  6. Step 6: Final answer
    x = 140.77

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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.