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Finding the Fourth Proportional to 117.25, 161.66 and 73.58

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Solution

The fourth proportional to 117.25, 161.66 and 73.58 is: 101.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.25 : 161.66 = 73.58 : x
  2. Step 2: Convert to fraction form
    117.25/161.66 = 73.58/x
  3. Step 3: Cross multiply
    117.25x = 161.66 × 73.58
  4. Step 4: Simplify right side
    117.25x = 11,894.32
  5. Step 5: Solve for x
    x = 11,894.32/117.25
  6. Step 6: Final answer
    x = 101.45

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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.