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Finding the Fourth Proportional to 109.89, 165.78 and 101.07

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Solution

The fourth proportional to 109.89, 165.78 and 101.07 is: 152.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.89 : 165.78 = 101.07 : x
  2. Step 2: Convert to fraction form
    109.89/165.78 = 101.07/x
  3. Step 3: Cross multiply
    109.89x = 165.78 × 101.07
  4. Step 4: Simplify right side
    109.89x = 16,755.38
  5. Step 5: Solve for x
    x = 16,755.38/109.89
  6. Step 6: Final answer
    x = 152.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.