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Finding the Fourth Proportional to 146.10, 201.55 and 90.81

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Solution

The fourth proportional to 146.10, 201.55 and 90.81 is: 125.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.10 : 201.55 = 90.81 : x
  2. Step 2: Convert to fraction form
    146.10/201.55 = 90.81/x
  3. Step 3: Cross multiply
    146.10x = 201.55 × 90.81
  4. Step 4: Simplify right side
    146.10x = 18,302.76
  5. Step 5: Solve for x
    x = 18,302.76/146.10
  6. Step 6: Final answer
    x = 125.28

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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.