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Finding the Fourth Proportional to 94.98, 131.06 and 55.64

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Solution

The fourth proportional to 94.98, 131.06 and 55.64 is: 76.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.98 : 131.06 = 55.64 : x
  2. Step 2: Convert to fraction form
    94.98/131.06 = 55.64/x
  3. Step 3: Cross multiply
    94.98x = 131.06 × 55.64
  4. Step 4: Simplify right side
    94.98x = 7,292.18
  5. Step 5: Solve for x
    x = 7,292.18/94.98
  6. Step 6: Final answer
    x = 76.78

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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.