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Finding the Fourth Proportional to 186.93, 258.03 and 113.22

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Solution

The fourth proportional to 186.93, 258.03 and 113.22 is: 156.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.93 : 258.03 = 113.22 : x
  2. Step 2: Convert to fraction form
    186.93/258.03 = 113.22/x
  3. Step 3: Cross multiply
    186.93x = 258.03 × 113.22
  4. Step 4: Simplify right side
    186.93x = 29,214.16
  5. Step 5: Solve for x
    x = 29,214.16/186.93
  6. Step 6: Final answer
    x = 156.28

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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.