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Finding the Fourth Proportional to 186.18, 256.96 and 107.50

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Solution

The fourth proportional to 186.18, 256.96 and 107.50 is: 148.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.18 : 256.96 = 107.50 : x
  2. Step 2: Convert to fraction form
    186.18/256.96 = 107.50/x
  3. Step 3: Cross multiply
    186.18x = 256.96 × 107.50
  4. Step 4: Simplify right side
    186.18x = 27,623.20
  5. Step 5: Solve for x
    x = 27,623.20/186.18
  6. Step 6: Final answer
    x = 148.37

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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.