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Finding the Fourth Proportional to 146.07, 201.47 and 90.81

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Solution

The fourth proportional to 146.07, 201.47 and 90.81 is: 125.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.07 : 201.47 = 90.81 : x
  2. Step 2: Convert to fraction form
    146.07/201.47 = 90.81/x
  3. Step 3: Cross multiply
    146.07x = 201.47 × 90.81
  4. Step 4: Simplify right side
    146.07x = 18,295.04
  5. Step 5: Solve for x
    x = 18,295.04/146.07
  6. Step 6: Final answer
    x = 125.25

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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.