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Finding the Fourth Proportional to 147.02, 202.74 and 97.81

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Solution

The fourth proportional to 147.02, 202.74 and 97.81 is: 134.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.02 : 202.74 = 97.81 : x
  2. Step 2: Convert to fraction form
    147.02/202.74 = 97.81/x
  3. Step 3: Cross multiply
    147.02x = 202.74 × 97.81
  4. Step 4: Simplify right side
    147.02x = 19,829.13
  5. Step 5: Solve for x
    x = 19,829.13/147.02
  6. Step 6: Final answer
    x = 134.88

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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.