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Finding the Fourth Proportional to 93.70, 129.46 and 92.08

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Solution

The fourth proportional to 93.70, 129.46 and 92.08 is: 127.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.70 : 129.46 = 92.08 : x
  2. Step 2: Convert to fraction form
    93.70/129.46 = 92.08/x
  3. Step 3: Cross multiply
    93.70x = 129.46 × 92.08
  4. Step 4: Simplify right side
    93.70x = 11,920.68
  5. Step 5: Solve for x
    x = 11,920.68/93.70
  6. Step 6: Final answer
    x = 127.22

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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.