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Finding the Fourth Proportional to 99.23, 137.03 and 94.64

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Solution

The fourth proportional to 99.23, 137.03 and 94.64 is: 130.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.23 : 137.03 = 94.64 : x
  2. Step 2: Convert to fraction form
    99.23/137.03 = 94.64/x
  3. Step 3: Cross multiply
    99.23x = 137.03 × 94.64
  4. Step 4: Simplify right side
    99.23x = 12,967.36
  5. Step 5: Solve for x
    x = 12,967.36/99.23
  6. Step 6: Final answer
    x = 130.69

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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.