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Finding the Fourth Proportional to 98.96, 148.36 and 47.55

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Solution

The fourth proportional to 98.96, 148.36 and 47.55 is: 71.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.96 : 148.36 = 47.55 : x
  2. Step 2: Convert to fraction form
    98.96/148.36 = 47.55/x
  3. Step 3: Cross multiply
    98.96x = 148.36 × 47.55
  4. Step 4: Simplify right side
    98.96x = 7,054.21
  5. Step 5: Solve for x
    x = 7,054.21/98.96
  6. Step 6: Final answer
    x = 71.29

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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.