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Finding the Fourth Proportional to 91,145.67, 125,780.79 and 50,859

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Solution

The fourth proportional to 91,145.67, 125,780.79 and 50,859 is: 70,185.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,145.67 : 125,780.79 = 50,859 : x
  2. Step 2: Convert to fraction form
    91,145.67/125,780.79 = 50,859/x
  3. Step 3: Cross multiply
    91,145.67x = 125,780.79 × 50,859
  4. Step 4: Simplify right side
    91,145.67x = 6,397,085,198.61
  5. Step 5: Solve for x
    x = 6,397,085,198.61/91,145.67
  6. Step 6: Final answer
    x = 70,185.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.