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Finding the Fourth Proportional to 117.58, 162.20 and 73.88

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Solution

The fourth proportional to 117.58, 162.20 and 73.88 is: 101.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.58 : 162.20 = 73.88 : x
  2. Step 2: Convert to fraction form
    117.58/162.20 = 73.88/x
  3. Step 3: Cross multiply
    117.58x = 162.20 × 73.88
  4. Step 4: Simplify right side
    117.58x = 11,983.34
  5. Step 5: Solve for x
    x = 11,983.34/117.58
  6. Step 6: Final answer
    x = 101.92

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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.