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Finding the Fourth Proportional to 93.86, 139.73 and 92.82

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Solution

The fourth proportional to 93.86, 139.73 and 92.82 is: 138.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.86 : 139.73 = 92.82 : x
  2. Step 2: Convert to fraction form
    93.86/139.73 = 92.82/x
  3. Step 3: Cross multiply
    93.86x = 139.73 × 92.82
  4. Step 4: Simplify right side
    93.86x = 12,969.74
  5. Step 5: Solve for x
    x = 12,969.74/93.86
  6. Step 6: Final answer
    x = 138.18

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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.