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Finding the Fourth Proportional to 170,857.80, 256,286.70 and 76,087.80

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Solution

The fourth proportional to 170,857.80, 256,286.70 and 76,087.80 is: 114,131.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,857.80 : 256,286.70 = 76,087.80 : x
  2. Step 2: Convert to fraction form
    170,857.80/256,286.70 = 76,087.80/x
  3. Step 3: Cross multiply
    170,857.80x = 256,286.70 × 76,087.80
  4. Step 4: Simplify right side
    170,857.80x = 19,500,291,172.26
  5. Step 5: Solve for x
    x = 19,500,291,172.26/170,857.80
  6. Step 6: Final answer
    x = 114,131.70

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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.