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Finding the Fourth Proportional to 60,786.40, 91,170.48 and 19,228

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Solution

The fourth proportional to 60,786.40, 91,170.48 and 19,228 is: 28,839.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,786.40 : 91,170.48 = 19,228 : x
  2. Step 2: Convert to fraction form
    60,786.40/91,170.48 = 19,228/x
  3. Step 3: Cross multiply
    60,786.40x = 91,170.48 × 19,228
  4. Step 4: Simplify right side
    60,786.40x = 1,753,025,989.44
  5. Step 5: Solve for x
    x = 1,753,025,989.44/60,786.40
  6. Step 6: Final answer
    x = 28,839.12

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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.