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Finding the Fourth Proportional to 170,190.87, 255,422.39 and 76,703.91

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Solution

The fourth proportional to 170,190.87, 255,422.39 and 76,703.91 is: 115,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,190.87 : 255,422.39 = 76,703.91 : x
  2. Step 2: Convert to fraction form
    170,190.87/255,422.39 = 76,703.91/x
  3. Step 3: Cross multiply
    170,190.87x = 255,422.39 × 76,703.91
  4. Step 4: Simplify right side
    170,190.87x = 19,591,895,631.03
  5. Step 5: Solve for x
    x = 19,591,895,631.03/170,190.87
  6. Step 6: Final answer
    x = 115,117.20

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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.