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Finding the Fourth Proportional to 98.76, 146.94 and 97.98

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Solution

The fourth proportional to 98.76, 146.94 and 97.98 is: 145.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.76 : 146.94 = 97.98 : x
  2. Step 2: Convert to fraction form
    98.76/146.94 = 97.98/x
  3. Step 3: Cross multiply
    98.76x = 146.94 × 97.98
  4. Step 4: Simplify right side
    98.76x = 14,397.18
  5. Step 5: Solve for x
    x = 14,397.18/98.76
  6. Step 6: Final answer
    x = 145.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.