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Finding the Fourth Proportional to 185.83, 256.35 and 129.79

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Solution

The fourth proportional to 185.83, 256.35 and 129.79 is: 179.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.83 : 256.35 = 129.79 : x
  2. Step 2: Convert to fraction form
    185.83/256.35 = 129.79/x
  3. Step 3: Cross multiply
    185.83x = 256.35 × 129.79
  4. Step 4: Simplify right side
    185.83x = 33,271.67
  5. Step 5: Solve for x
    x = 33,271.67/185.83
  6. Step 6: Final answer
    x = 179.04

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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.