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Finding the Fourth Proportional to 146.39, 202.50 and 129.15

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Solution

The fourth proportional to 146.39, 202.50 and 129.15 is: 178.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.39 : 202.50 = 129.15 : x
  2. Step 2: Convert to fraction form
    146.39/202.50 = 129.15/x
  3. Step 3: Cross multiply
    146.39x = 202.50 × 129.15
  4. Step 4: Simplify right side
    146.39x = 26,152.88
  5. Step 5: Solve for x
    x = 26,152.88/146.39
  6. Step 6: Final answer
    x = 178.66

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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.