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Finding the Fourth Proportional to 98.55, 134.72 and 94.77

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Solution

The fourth proportional to 98.55, 134.72 and 94.77 is: 129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.55 : 134.72 = 94.77 : x
  2. Step 2: Convert to fraction form
    98.55/134.72 = 94.77/x
  3. Step 3: Cross multiply
    98.55x = 134.72 × 94.77
  4. Step 4: Simplify right side
    98.55x = 12,767.41
  5. Step 5: Solve for x
    x = 12,767.41/98.55
  6. Step 6: Final answer
    x = 129.55

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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.