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Finding the Fourth Proportional to 146.68, 202.39 and 87.66

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Solution

The fourth proportional to 146.68, 202.39 and 87.66 is: 120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.68 : 202.39 = 87.66 : x
  2. Step 2: Convert to fraction form
    146.68/202.39 = 87.66/x
  3. Step 3: Cross multiply
    146.68x = 202.39 × 87.66
  4. Step 4: Simplify right side
    146.68x = 17,741.29
  5. Step 5: Solve for x
    x = 17,741.29/146.68
  6. Step 6: Final answer
    x = 120.95

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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.