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Finding the Fourth Proportional to 93.65, 141.11 and 91.61

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Solution

The fourth proportional to 93.65, 141.11 and 91.61 is: 138.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.65 : 141.11 = 91.61 : x
  2. Step 2: Convert to fraction form
    93.65/141.11 = 91.61/x
  3. Step 3: Cross multiply
    93.65x = 141.11 × 91.61
  4. Step 4: Simplify right side
    93.65x = 12,925.92
  5. Step 5: Solve for x
    x = 12,925.92/93.65
  6. Step 6: Final answer
    x = 138.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.