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Finding the Fourth Proportional to 117.41, 162.15 and 84.80

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Solution

The fourth proportional to 117.41, 162.15 and 84.80 is: 117.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.41 : 162.15 = 84.80 : x
  2. Step 2: Convert to fraction form
    117.41/162.15 = 84.80/x
  3. Step 3: Cross multiply
    117.41x = 162.15 × 84.80
  4. Step 4: Simplify right side
    117.41x = 13,749.51
  5. Step 5: Solve for x
    x = 13,749.51/117.41
  6. Step 6: Final answer
    x = 117.11

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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.