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Finding the Fourth Proportional to 93.22, 139.21 and 92.22

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Solution

The fourth proportional to 93.22, 139.21 and 92.22 is: 137.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.22 : 139.21 = 92.22 : x
  2. Step 2: Convert to fraction form
    93.22/139.21 = 92.22/x
  3. Step 3: Cross multiply
    93.22x = 139.21 × 92.22
  4. Step 4: Simplify right side
    93.22x = 12,837.95
  5. Step 5: Solve for x
    x = 12,837.95/93.22
  6. Step 6: Final answer
    x = 137.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.