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Finding the Fourth Proportional to 165.99, 229.03 and 100.51

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Solution

The fourth proportional to 165.99, 229.03 and 100.51 is: 138.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.99 : 229.03 = 100.51 : x
  2. Step 2: Convert to fraction form
    165.99/229.03 = 100.51/x
  3. Step 3: Cross multiply
    165.99x = 229.03 × 100.51
  4. Step 4: Simplify right side
    165.99x = 23,019.81
  5. Step 5: Solve for x
    x = 23,019.81/165.99
  6. Step 6: Final answer
    x = 138.68

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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.