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Finding the Fourth Proportional to 165.34, 228.19 and 99.84

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Solution

The fourth proportional to 165.34, 228.19 and 99.84 is: 137.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.34 : 228.19 = 99.84 : x
  2. Step 2: Convert to fraction form
    165.34/228.19 = 99.84/x
  3. Step 3: Cross multiply
    165.34x = 228.19 × 99.84
  4. Step 4: Simplify right side
    165.34x = 22,782.49
  5. Step 5: Solve for x
    x = 22,782.49/165.34
  6. Step 6: Final answer
    x = 137.79

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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.