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Finding the Fourth Proportional to 136.96, 189.12 and 114.08

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Solution

The fourth proportional to 136.96, 189.12 and 114.08 is: 157.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.96 : 189.12 = 114.08 : x
  2. Step 2: Convert to fraction form
    136.96/189.12 = 114.08/x
  3. Step 3: Cross multiply
    136.96x = 189.12 × 114.08
  4. Step 4: Simplify right side
    136.96x = 21,574.81
  5. Step 5: Solve for x
    x = 21,574.81/136.96
  6. Step 6: Final answer
    x = 157.53

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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.