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Finding the Fourth Proportional to 93.44, 129.01 and 72.68

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Solution

The fourth proportional to 93.44, 129.01 and 72.68 is: 100.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.44 : 129.01 = 72.68 : x
  2. Step 2: Convert to fraction form
    93.44/129.01 = 72.68/x
  3. Step 3: Cross multiply
    93.44x = 129.01 × 72.68
  4. Step 4: Simplify right side
    93.44x = 9,376.48
  5. Step 5: Solve for x
    x = 9,376.48/93.44
  6. Step 6: Final answer
    x = 100.35

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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.