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Finding the Fourth Proportional to 170.83, 256.13 and 83.99

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Solution

The fourth proportional to 170.83, 256.13 and 83.99 is: 125.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.83 : 256.13 = 83.99 : x
  2. Step 2: Convert to fraction form
    170.83/256.13 = 83.99/x
  3. Step 3: Cross multiply
    170.83x = 256.13 × 83.99
  4. Step 4: Simplify right side
    170.83x = 21,511.45
  5. Step 5: Solve for x
    x = 21,511.45/170.83
  6. Step 6: Final answer
    x = 125.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.