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Finding the Fourth Proportional to 136.52, 187.86 and 118.01

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Solution

The fourth proportional to 136.52, 187.86 and 118.01 is: 162.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.52 : 187.86 = 118.01 : x
  2. Step 2: Convert to fraction form
    136.52/187.86 = 118.01/x
  3. Step 3: Cross multiply
    136.52x = 187.86 × 118.01
  4. Step 4: Simplify right side
    136.52x = 22,169.36
  5. Step 5: Solve for x
    x = 22,169.36/136.52
  6. Step 6: Final answer
    x = 162.39

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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.