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Finding the Fourth Proportional to 93.74, 139.88 and 84.63

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Solution

The fourth proportional to 93.74, 139.88 and 84.63 is: 126.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.74 : 139.88 = 84.63 : x
  2. Step 2: Convert to fraction form
    93.74/139.88 = 84.63/x
  3. Step 3: Cross multiply
    93.74x = 139.88 × 84.63
  4. Step 4: Simplify right side
    93.74x = 11,837.62
  5. Step 5: Solve for x
    x = 11,837.62/93.74
  6. Step 6: Final answer
    x = 126.29

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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.