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Finding the Fourth Proportional to 164.35, 246.57 and 99.42

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Solution

The fourth proportional to 164.35, 246.57 and 99.42 is: 149.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.35 : 246.57 = 99.42 : x
  2. Step 2: Convert to fraction form
    164.35/246.57 = 99.42/x
  3. Step 3: Cross multiply
    164.35x = 246.57 × 99.42
  4. Step 4: Simplify right side
    164.35x = 24,513.99
  5. Step 5: Solve for x
    x = 24,513.99/164.35
  6. Step 6: Final answer
    x = 149.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.