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Finding the Fourth Proportional to 146.09, 201.47 and 98.74

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Solution

The fourth proportional to 146.09, 201.47 and 98.74 is: 136.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.09 : 201.47 = 98.74 : x
  2. Step 2: Convert to fraction form
    146.09/201.47 = 98.74/x
  3. Step 3: Cross multiply
    146.09x = 201.47 × 98.74
  4. Step 4: Simplify right side
    146.09x = 19,893.15
  5. Step 5: Solve for x
    x = 19,893.15/146.09
  6. Step 6: Final answer
    x = 136.17

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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.