Home / 105,236.97-145,185.53-66,986.61

Finding the Fourth Proportional to 105,236.97, 145,185.53 and 66,986.61

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Solution

The fourth proportional to 105,236.97, 145,185.53 and 66,986.61 is: 92,415.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,236.97 : 145,185.53 = 66,986.61 : x
  2. Step 2: Convert to fraction form
    105,236.97/145,185.53 = 66,986.61/x
  3. Step 3: Cross multiply
    105,236.97x = 145,185.53 × 66,986.61
  4. Step 4: Simplify right side
    105,236.97x = 9,725,486,140.82
  5. Step 5: Solve for x
    x = 9,725,486,140.82/105,236.97
  6. Step 6: Final answer
    x = 92,415.11

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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.