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Finding the Fourth Proportional to 60,812, 91,143.12 and 43,186.40

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Solution

The fourth proportional to 60,812, 91,143.12 and 43,186.40 is: 64,726.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,812 : 91,143.12 = 43,186.40 : x
  2. Step 2: Convert to fraction form
    60,812/91,143.12 = 43,186.40/x
  3. Step 3: Cross multiply
    60,812x = 91,143.12 × 43,186.40
  4. Step 4: Simplify right side
    60,812x = 3,936,143,237.57
  5. Step 5: Solve for x
    x = 3,936,143,237.57/60,812
  6. Step 6: Final answer
    x = 64,726.42

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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.