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Finding the Fourth Proportional to 93.15, 129.13 and 82.35

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Solution

The fourth proportional to 93.15, 129.13 and 82.35 is: 114.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.15 : 129.13 = 82.35 : x
  2. Step 2: Convert to fraction form
    93.15/129.13 = 82.35/x
  3. Step 3: Cross multiply
    93.15x = 129.13 × 82.35
  4. Step 4: Simplify right side
    93.15x = 10,633.65
  5. Step 5: Solve for x
    x = 10,633.65/93.15
  6. Step 6: Final answer
    x = 114.16

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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.