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Finding the Fourth Proportional to 147.42, 203.45 and 88.43

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Solution

The fourth proportional to 147.42, 203.45 and 88.43 is: 122.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.42 : 203.45 = 88.43 : x
  2. Step 2: Convert to fraction form
    147.42/203.45 = 88.43/x
  3. Step 3: Cross multiply
    147.42x = 203.45 × 88.43
  4. Step 4: Simplify right side
    147.42x = 17,989.62
  5. Step 5: Solve for x
    x = 17,989.62/147.42
  6. Step 6: Final answer
    x = 122.03

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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.