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Finding the Fourth Proportional to 67,306, 92,796.02 and 55,161.78

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Solution

The fourth proportional to 67,306, 92,796.02 and 55,161.78 is: 76,052.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,306 : 92,796.02 = 55,161.78 : x
  2. Step 2: Convert to fraction form
    67,306/92,796.02 = 55,161.78/x
  3. Step 3: Cross multiply
    67,306x = 92,796.02 × 55,161.78
  4. Step 4: Simplify right side
    67,306x = 5,118,793,640.12
  5. Step 5: Solve for x
    x = 5,118,793,640.12/67,306
  6. Step 6: Final answer
    x = 76,052.56

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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.