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Finding the Fourth Proportional to 98.18, 134.70 and 95.78

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Solution

The fourth proportional to 98.18, 134.70 and 95.78 is: 131.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.18 : 134.70 = 95.78 : x
  2. Step 2: Convert to fraction form
    98.18/134.70 = 95.78/x
  3. Step 3: Cross multiply
    98.18x = 134.70 × 95.78
  4. Step 4: Simplify right side
    98.18x = 12,901.09
  5. Step 5: Solve for x
    x = 12,901.09/98.18
  6. Step 6: Final answer
    x = 131.40

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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.