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Finding the Fourth Proportional to 147.69, 203.85 and 98.55

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Solution

The fourth proportional to 147.69, 203.85 and 98.55 is: 136.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.69 : 203.85 = 98.55 : x
  2. Step 2: Convert to fraction form
    147.69/203.85 = 98.55/x
  3. Step 3: Cross multiply
    147.69x = 203.85 × 98.55
  4. Step 4: Simplify right side
    147.69x = 20,089.42
  5. Step 5: Solve for x
    x = 20,089.42/147.69
  6. Step 6: Final answer
    x = 136.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.