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Finding the Fourth Proportional to 93.06, 139.68 and 77.94

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Solution

The fourth proportional to 93.06, 139.68 and 77.94 is: 116.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.06 : 139.68 = 77.94 : x
  2. Step 2: Convert to fraction form
    93.06/139.68 = 77.94/x
  3. Step 3: Cross multiply
    93.06x = 139.68 × 77.94
  4. Step 4: Simplify right side
    93.06x = 10,886.66
  5. Step 5: Solve for x
    x = 10,886.66/93.06
  6. Step 6: Final answer
    x = 116.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.