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Finding the Fourth Proportional to 185.69, 256.10 and 125.78

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Solution

The fourth proportional to 185.69, 256.10 and 125.78 is: 173.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.69 : 256.10 = 125.78 : x
  2. Step 2: Convert to fraction form
    185.69/256.10 = 125.78/x
  3. Step 3: Cross multiply
    185.69x = 256.10 × 125.78
  4. Step 4: Simplify right side
    185.69x = 32,210.35
  5. Step 5: Solve for x
    x = 32,210.35/185.69
  6. Step 6: Final answer
    x = 173.46

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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.