Home / 91,823.20-137,540.40-81,973.60

Finding the Fourth Proportional to 91,823.20, 137,540.40 and 81,973.60

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Solution

The fourth proportional to 91,823.20, 137,540.40 and 81,973.60 is: 122,786.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,823.20 : 137,540.40 = 81,973.60 : x
  2. Step 2: Convert to fraction form
    91,823.20/137,540.40 = 81,973.60/x
  3. Step 3: Cross multiply
    91,823.20x = 137,540.40 × 81,973.60
  4. Step 4: Simplify right side
    91,823.20x = 11,274,681,733.44
  5. Step 5: Solve for x
    x = 11,274,681,733.44/91,823.20
  6. Step 6: Final answer
    x = 122,786.85

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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.