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Finding the Fourth Proportional to 147.75, 203.93 and 98.63

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Solution

The fourth proportional to 147.75, 203.93 and 98.63 is: 136.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.75 : 203.93 = 98.63 : x
  2. Step 2: Convert to fraction form
    147.75/203.93 = 98.63/x
  3. Step 3: Cross multiply
    147.75x = 203.93 × 98.63
  4. Step 4: Simplify right side
    147.75x = 20,113.62
  5. Step 5: Solve for x
    x = 20,113.62/147.75
  6. Step 6: Final answer
    x = 136.13

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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.