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Finding the Fourth Proportional to 170,164.49, 255,404.28 and 85,983.89

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Solution

The fourth proportional to 170,164.49, 255,404.28 and 85,983.89 is: 129,055.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,164.49 : 255,404.28 = 85,983.89 : x
  2. Step 2: Convert to fraction form
    170,164.49/255,404.28 = 85,983.89/x
  3. Step 3: Cross multiply
    170,164.49x = 255,404.28 × 85,983.89
  4. Step 4: Simplify right side
    170,164.49x = 21,960,653,517.05
  5. Step 5: Solve for x
    x = 21,960,653,517.05/170,164.49
  6. Step 6: Final answer
    x = 129,055.44

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1.5x scale

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.