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Finding the Fourth Proportional to 185.70, 256.32 and 111.99

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Solution

The fourth proportional to 185.70, 256.32 and 111.99 is: 154.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.70 : 256.32 = 111.99 : x
  2. Step 2: Convert to fraction form
    185.70/256.32 = 111.99/x
  3. Step 3: Cross multiply
    185.70x = 256.32 × 111.99
  4. Step 4: Simplify right side
    185.70x = 28,705.28
  5. Step 5: Solve for x
    x = 28,705.28/185.70
  6. Step 6: Final answer
    x = 154.58

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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.