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Finding the Fourth Proportional to 93.48, 129.07 and 71.39

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Solution

The fourth proportional to 93.48, 129.07 and 71.39 is: 98.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.48 : 129.07 = 71.39 : x
  2. Step 2: Convert to fraction form
    93.48/129.07 = 71.39/x
  3. Step 3: Cross multiply
    93.48x = 129.07 × 71.39
  4. Step 4: Simplify right side
    93.48x = 9,213.31
  5. Step 5: Solve for x
    x = 9,213.31/93.48
  6. Step 6: Final answer
    x = 98.56

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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.