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Finding the Fourth Proportional to 89.15, 122.93 and 73.14

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Solution

The fourth proportional to 89.15, 122.93 and 73.14 is: 100.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.15 : 122.93 = 73.14 : x
  2. Step 2: Convert to fraction form
    89.15/122.93 = 73.14/x
  3. Step 3: Cross multiply
    89.15x = 122.93 × 73.14
  4. Step 4: Simplify right side
    89.15x = 8,990.49
  5. Step 5: Solve for x
    x = 8,990.49/89.15
  6. Step 6: Final answer
    x = 100.84

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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.