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Finding the Fourth Proportional to 145.94, 201.41 and 80.45

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Solution

The fourth proportional to 145.94, 201.41 and 80.45 is: 111.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.94 : 201.41 = 80.45 : x
  2. Step 2: Convert to fraction form
    145.94/201.41 = 80.45/x
  3. Step 3: Cross multiply
    145.94x = 201.41 × 80.45
  4. Step 4: Simplify right side
    145.94x = 16,203.07
  5. Step 5: Solve for x
    x = 16,203.07/145.94
  6. Step 6: Final answer
    x = 111.02

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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.