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Finding the Fourth Proportional to 91,102.05, 125,721.03 and 50,814.78

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Solution

The fourth proportional to 91,102.05, 125,721.03 and 50,814.78 is: 70,124.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,102.05 : 125,721.03 = 50,814.78 : x
  2. Step 2: Convert to fraction form
    91,102.05/125,721.03 = 50,814.78/x
  3. Step 3: Cross multiply
    91,102.05x = 125,721.03 × 50,814.78
  4. Step 4: Simplify right side
    91,102.05x = 6,388,486,480.82
  5. Step 5: Solve for x
    x = 6,388,486,480.82/91,102.05
  6. Step 6: Final answer
    x = 70,124.51

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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.