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Finding the Fourth Proportional to 93.39, 129.01 and 74.95

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Solution

The fourth proportional to 93.39, 129.01 and 74.95 is: 103.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.39 : 129.01 = 74.95 : x
  2. Step 2: Convert to fraction form
    93.39/129.01 = 74.95/x
  3. Step 3: Cross multiply
    93.39x = 129.01 × 74.95
  4. Step 4: Simplify right side
    93.39x = 9,669.30
  5. Step 5: Solve for x
    x = 9,669.30/93.39
  6. Step 6: Final answer
    x = 103.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.