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Finding the Fourth Proportional to 99.23, 136.18 and 94.91

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Solution

The fourth proportional to 99.23, 136.18 and 94.91 is: 130.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.23 : 136.18 = 94.91 : x
  2. Step 2: Convert to fraction form
    99.23/136.18 = 94.91/x
  3. Step 3: Cross multiply
    99.23x = 136.18 × 94.91
  4. Step 4: Simplify right side
    99.23x = 12,924.28
  5. Step 5: Solve for x
    x = 12,924.28/99.23
  6. Step 6: Final answer
    x = 130.25

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.