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Finding the Fourth Proportional to 145.17, 200.12 and 103.77

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Solution

The fourth proportional to 145.17, 200.12 and 103.77 is: 143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.17 : 200.12 = 103.77 : x
  2. Step 2: Convert to fraction form
    145.17/200.12 = 103.77/x
  3. Step 3: Cross multiply
    145.17x = 200.12 × 103.77
  4. Step 4: Simplify right side
    145.17x = 20,765.93
  5. Step 5: Solve for x
    x = 20,765.93/145.17
  6. Step 6: Final answer
    x = 143.05

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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.