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Finding the Fourth Proportional to 147.96, 203.92 and 98.75

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Solution

The fourth proportional to 147.96, 203.92 and 98.75 is: 136.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.96 : 203.92 = 98.75 : x
  2. Step 2: Convert to fraction form
    147.96/203.92 = 98.75/x
  3. Step 3: Cross multiply
    147.96x = 203.92 × 98.75
  4. Step 4: Simplify right side
    147.96x = 20,137.36
  5. Step 5: Solve for x
    x = 20,137.36/147.96
  6. Step 6: Final answer
    x = 136.10

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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.