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Finding the Fourth Proportional to 88.18, 121.66 and 50.83

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Solution

The fourth proportional to 88.18, 121.66 and 50.83 is: 70.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.18 : 121.66 = 50.83 : x
  2. Step 2: Convert to fraction form
    88.18/121.66 = 50.83/x
  3. Step 3: Cross multiply
    88.18x = 121.66 × 50.83
  4. Step 4: Simplify right side
    88.18x = 6,183.37
  5. Step 5: Solve for x
    x = 6,183.37/88.18
  6. Step 6: Final answer
    x = 70.13

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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.