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Finding the Fourth Proportional to 117.45, 161.94 and 99

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Solution

The fourth proportional to 117.45, 161.94 and 99 is: 136.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.45 : 161.94 = 99 : x
  2. Step 2: Convert to fraction form
    117.45/161.94 = 99/x
  3. Step 3: Cross multiply
    117.45x = 161.94 × 99
  4. Step 4: Simplify right side
    117.45x = 16,032.06
  5. Step 5: Solve for x
    x = 16,032.06/117.45
  6. Step 6: Final answer
    x = 136.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.