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Finding the Fourth Proportional to 186.05, 256.74 and 103.15

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Solution

The fourth proportional to 186.05, 256.74 and 103.15 is: 142.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.05 : 256.74 = 103.15 : x
  2. Step 2: Convert to fraction form
    186.05/256.74 = 103.15/x
  3. Step 3: Cross multiply
    186.05x = 256.74 × 103.15
  4. Step 4: Simplify right side
    186.05x = 26,484.08
  5. Step 5: Solve for x
    x = 26,484.08/186.05
  6. Step 6: Final answer
    x = 142.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.