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Finding the Fourth Proportional to 147.36, 222.21 and 129.60

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Solution

The fourth proportional to 147.36, 222.21 and 129.60 is: 195.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.36 : 222.21 = 129.60 : x
  2. Step 2: Convert to fraction form
    147.36/222.21 = 129.60/x
  3. Step 3: Cross multiply
    147.36x = 222.21 × 129.60
  4. Step 4: Simplify right side
    147.36x = 28,798.42
  5. Step 5: Solve for x
    x = 28,798.42/147.36
  6. Step 6: Final answer
    x = 195.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.