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Finding the Fourth Proportional to 145.66, 201.03 and 99.09

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Solution

The fourth proportional to 145.66, 201.03 and 99.09 is: 136.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.66 : 201.03 = 99.09 : x
  2. Step 2: Convert to fraction form
    145.66/201.03 = 99.09/x
  3. Step 3: Cross multiply
    145.66x = 201.03 × 99.09
  4. Step 4: Simplify right side
    145.66x = 19,919.06
  5. Step 5: Solve for x
    x = 19,919.06/145.66
  6. Step 6: Final answer
    x = 136.75

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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.