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Finding the Fourth Proportional to 148.60, 204.66 and 109.72

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Solution

The fourth proportional to 148.60, 204.66 and 109.72 is: 151.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.60 : 204.66 = 109.72 : x
  2. Step 2: Convert to fraction form
    148.60/204.66 = 109.72/x
  3. Step 3: Cross multiply
    148.60x = 204.66 × 109.72
  4. Step 4: Simplify right side
    148.60x = 22,455.30
  5. Step 5: Solve for x
    x = 22,455.30/148.60
  6. Step 6: Final answer
    x = 151.11

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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.