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Finding the Fourth Proportional to 93.54, 139.47 and 91.14

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Solution

The fourth proportional to 93.54, 139.47 and 91.14 is: 135.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.54 : 139.47 = 91.14 : x
  2. Step 2: Convert to fraction form
    93.54/139.47 = 91.14/x
  3. Step 3: Cross multiply
    93.54x = 139.47 × 91.14
  4. Step 4: Simplify right side
    93.54x = 12,710.43
  5. Step 5: Solve for x
    x = 12,710.43/93.54
  6. Step 6: Final answer
    x = 135.88

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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.