Home / 87,986.37-120,971.60-78,334.41

Finding the Fourth Proportional to 87,986.37, 120,971.60 and 78,334.41

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Solution

The fourth proportional to 87,986.37, 120,971.60 and 78,334.41 is: 107,701.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,986.37 : 120,971.60 = 78,334.41 : x
  2. Step 2: Convert to fraction form
    87,986.37/120,971.60 = 78,334.41/x
  3. Step 3: Cross multiply
    87,986.37x = 120,971.60 × 78,334.41
  4. Step 4: Simplify right side
    87,986.37x = 9,476,238,912.76
  5. Step 5: Solve for x
    x = 9,476,238,912.76/87,986.37
  6. Step 6: Final answer
    x = 107,701.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.