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Finding the Fourth Proportional to 187.98, 259.38 and 118.08

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Solution

The fourth proportional to 187.98, 259.38 and 118.08 is: 162.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.98 : 259.38 = 118.08 : x
  2. Step 2: Convert to fraction form
    187.98/259.38 = 118.08/x
  3. Step 3: Cross multiply
    187.98x = 259.38 × 118.08
  4. Step 4: Simplify right side
    187.98x = 30,627.59
  5. Step 5: Solve for x
    x = 30,627.59/187.98
  6. Step 6: Final answer
    x = 162.93

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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.