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Finding the Fourth Proportional to 93.45, 140.28 and 79.07

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Solution

The fourth proportional to 93.45, 140.28 and 79.07 is: 118.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.45 : 140.28 = 79.07 : x
  2. Step 2: Convert to fraction form
    93.45/140.28 = 79.07/x
  3. Step 3: Cross multiply
    93.45x = 140.28 × 79.07
  4. Step 4: Simplify right side
    93.45x = 11,091.54
  5. Step 5: Solve for x
    x = 11,091.54/93.45
  6. Step 6: Final answer
    x = 118.69

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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.