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Finding the Fourth Proportional to 117.58, 162.28 and 68.46

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Solution

The fourth proportional to 117.58, 162.28 and 68.46 is: 94.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.58 : 162.28 = 68.46 : x
  2. Step 2: Convert to fraction form
    117.58/162.28 = 68.46/x
  3. Step 3: Cross multiply
    117.58x = 162.28 × 68.46
  4. Step 4: Simplify right side
    117.58x = 11,109.52
  5. Step 5: Solve for x
    x = 11,109.52/117.58
  6. Step 6: Final answer
    x = 94.48

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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.