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Finding the Fourth Proportional to 170.99, 256.51 and 84.32

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Solution

The fourth proportional to 170.99, 256.51 and 84.32 is: 126.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.99 : 256.51 = 84.32 : x
  2. Step 2: Convert to fraction form
    170.99/256.51 = 84.32/x
  3. Step 3: Cross multiply
    170.99x = 256.51 × 84.32
  4. Step 4: Simplify right side
    170.99x = 21,627.75
  5. Step 5: Solve for x
    x = 21,627.75/170.99
  6. Step 6: Final answer
    x = 126.49

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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.