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Finding the Fourth Proportional to 98.16, 134.70 and 95.70

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Solution

The fourth proportional to 98.16, 134.70 and 95.70 is: 131.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.16 : 134.70 = 95.70 : x
  2. Step 2: Convert to fraction form
    98.16/134.70 = 95.70/x
  3. Step 3: Cross multiply
    98.16x = 134.70 × 95.70
  4. Step 4: Simplify right side
    98.16x = 12,890.79
  5. Step 5: Solve for x
    x = 12,890.79/98.16
  6. Step 6: Final answer
    x = 131.32

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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.