Home / 81,534.45-122,305.49-67,276.47

Finding the Fourth Proportional to 81,534.45, 122,305.49 and 67,276.47

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Solution

The fourth proportional to 81,534.45, 122,305.49 and 67,276.47 is: 100,917.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,534.45 : 122,305.49 = 67,276.47 : x
  2. Step 2: Convert to fraction form
    81,534.45/122,305.49 = 67,276.47/x
  3. Step 3: Cross multiply
    81,534.45x = 122,305.49 × 67,276.47
  4. Step 4: Simplify right side
    81,534.45x = 8,228,282,381.80
  5. Step 5: Solve for x
    x = 8,228,282,381.80/81,534.45
  6. Step 6: Final answer
    x = 100,917.86

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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.