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Finding the Fourth Proportional to 98.76, 136.54 and 94.45

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Solution

The fourth proportional to 98.76, 136.54 and 94.45 is: 130.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.76 : 136.54 = 94.45 : x
  2. Step 2: Convert to fraction form
    98.76/136.54 = 94.45/x
  3. Step 3: Cross multiply
    98.76x = 136.54 × 94.45
  4. Step 4: Simplify right side
    98.76x = 12,896.20
  5. Step 5: Solve for x
    x = 12,896.20/98.76
  6. Step 6: Final answer
    x = 130.58

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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.