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Finding the Fourth Proportional to 117.71, 162.35 and 93.11

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Solution

The fourth proportional to 117.71, 162.35 and 93.11 is: 128.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.71 : 162.35 = 93.11 : x
  2. Step 2: Convert to fraction form
    117.71/162.35 = 93.11/x
  3. Step 3: Cross multiply
    117.71x = 162.35 × 93.11
  4. Step 4: Simplify right side
    117.71x = 15,115.13
  5. Step 5: Solve for x
    x = 15,115.13/117.71
  6. Step 6: Final answer
    x = 128.41

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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.