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Finding the Fourth Proportional to 98.88, 148.32 and 97.92

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Solution

The fourth proportional to 98.88, 148.32 and 97.92 is: 146.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.88 : 148.32 = 97.92 : x
  2. Step 2: Convert to fraction form
    98.88/148.32 = 97.92/x
  3. Step 3: Cross multiply
    98.88x = 148.32 × 97.92
  4. Step 4: Simplify right side
    98.88x = 14,523.49
  5. Step 5: Solve for x
    x = 14,523.49/98.88
  6. Step 6: Final answer
    x = 146.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.