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Finding the Fourth Proportional to 189.56, 261.48 and 145.84

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Solution

The fourth proportional to 189.56, 261.48 and 145.84 is: 201.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.56 : 261.48 = 145.84 : x
  2. Step 2: Convert to fraction form
    189.56/261.48 = 145.84/x
  3. Step 3: Cross multiply
    189.56x = 261.48 × 145.84
  4. Step 4: Simplify right side
    189.56x = 38,134.24
  5. Step 5: Solve for x
    x = 38,134.24/189.56
  6. Step 6: Final answer
    x = 201.17

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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.