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Finding the Fourth Proportional to 93.65, 129.96 and 91.13

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Solution

The fourth proportional to 93.65, 129.96 and 91.13 is: 126.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.65 : 129.96 = 91.13 : x
  2. Step 2: Convert to fraction form
    93.65/129.96 = 91.13/x
  3. Step 3: Cross multiply
    93.65x = 129.96 × 91.13
  4. Step 4: Simplify right side
    93.65x = 11,842.80
  5. Step 5: Solve for x
    x = 11,842.80/93.65
  6. Step 6: Final answer
    x = 126.46

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.