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Finding the Fourth Proportional to 145.01, 200.02 and 103.61

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Solution

The fourth proportional to 145.01, 200.02 and 103.61 is: 142.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.01 : 200.02 = 103.61 : x
  2. Step 2: Convert to fraction form
    145.01/200.02 = 103.61/x
  3. Step 3: Cross multiply
    145.01x = 200.02 × 103.61
  4. Step 4: Simplify right side
    145.01x = 20,724.07
  5. Step 5: Solve for x
    x = 20,724.07/145.01
  6. Step 6: Final answer
    x = 142.91

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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.