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Finding the Fourth Proportional to 98.91, 134.66 and 98.60

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Solution

The fourth proportional to 98.91, 134.66 and 98.60 is: 134.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.91 : 134.66 = 98.60 : x
  2. Step 2: Convert to fraction form
    98.91/134.66 = 98.60/x
  3. Step 3: Cross multiply
    98.91x = 134.66 × 98.60
  4. Step 4: Simplify right side
    98.91x = 13,277.48
  5. Step 5: Solve for x
    x = 13,277.48/98.91
  6. Step 6: Final answer
    x = 134.24

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.