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Finding the Fourth Proportional to 98.40, 134.89 and 95.98

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Solution

The fourth proportional to 98.40, 134.89 and 95.98 is: 131.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.40 : 134.89 = 95.98 : x
  2. Step 2: Convert to fraction form
    98.40/134.89 = 95.98/x
  3. Step 3: Cross multiply
    98.40x = 134.89 × 95.98
  4. Step 4: Simplify right side
    98.40x = 12,946.74
  5. Step 5: Solve for x
    x = 12,946.74/98.40
  6. Step 6: Final answer
    x = 131.57

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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.