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Finding the Fourth Proportional to 147.12, 202.53 and 122.51

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Solution

The fourth proportional to 147.12, 202.53 and 122.51 is: 168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.12 : 202.53 = 122.51 : x
  2. Step 2: Convert to fraction form
    147.12/202.53 = 122.51/x
  3. Step 3: Cross multiply
    147.12x = 202.53 × 122.51
  4. Step 4: Simplify right side
    147.12x = 24,812.92
  5. Step 5: Solve for x
    x = 24,812.92/147.12
  6. Step 6: Final answer
    x = 168.66

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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.