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Finding the Fourth Proportional to 98.86, 148.30 and 96.98

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Solution

The fourth proportional to 98.86, 148.30 and 96.98 is: 145.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.86 : 148.30 = 96.98 : x
  2. Step 2: Convert to fraction form
    98.86/148.30 = 96.98/x
  3. Step 3: Cross multiply
    98.86x = 148.30 × 96.98
  4. Step 4: Simplify right side
    98.86x = 14,382.13
  5. Step 5: Solve for x
    x = 14,382.13/98.86
  6. Step 6: Final answer
    x = 145.48

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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.