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Finding the Fourth Proportional to 98.10, 147.09 and 37.20

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Solution

The fourth proportional to 98.10, 147.09 and 37.20 is: 55.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.10 : 147.09 = 37.20 : x
  2. Step 2: Convert to fraction form
    98.10/147.09 = 37.20/x
  3. Step 3: Cross multiply
    98.10x = 147.09 × 37.20
  4. Step 4: Simplify right side
    98.10x = 5,471.75
  5. Step 5: Solve for x
    x = 5,471.75/98.10
  6. Step 6: Final answer
    x = 55.78

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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.