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Finding the Fourth Proportional to 99.76, 137.55 and 94.63

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Solution

The fourth proportional to 99.76, 137.55 and 94.63 is: 130.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.76 : 137.55 = 94.63 : x
  2. Step 2: Convert to fraction form
    99.76/137.55 = 94.63/x
  3. Step 3: Cross multiply
    99.76x = 137.55 × 94.63
  4. Step 4: Simplify right side
    99.76x = 13,016.36
  5. Step 5: Solve for x
    x = 13,016.36/99.76
  6. Step 6: Final answer
    x = 130.48

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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.