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Finding the Fourth Proportional to 93.71, 139.62 and 92.49

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Solution

The fourth proportional to 93.71, 139.62 and 92.49 is: 137.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.71 : 139.62 = 92.49 : x
  2. Step 2: Convert to fraction form
    93.71/139.62 = 92.49/x
  3. Step 3: Cross multiply
    93.71x = 139.62 × 92.49
  4. Step 4: Simplify right side
    93.71x = 12,914.06
  5. Step 5: Solve for x
    x = 12,914.06/93.71
  6. Step 6: Final answer
    x = 137.81

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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.