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Finding the Fourth Proportional to 117.83, 162.57 and 80.99

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Solution

The fourth proportional to 117.83, 162.57 and 80.99 is: 111.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.83 : 162.57 = 80.99 : x
  2. Step 2: Convert to fraction form
    117.83/162.57 = 80.99/x
  3. Step 3: Cross multiply
    117.83x = 162.57 × 80.99
  4. Step 4: Simplify right side
    117.83x = 13,166.54
  5. Step 5: Solve for x
    x = 13,166.54/117.83
  6. Step 6: Final answer
    x = 111.74

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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.