Home / 91,805.20-137,513.40-81,955.60

Finding the Fourth Proportional to 91,805.20, 137,513.40 and 81,955.60

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Solution

The fourth proportional to 91,805.20, 137,513.40 and 81,955.60 is: 122,759.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,805.20 : 137,513.40 = 81,955.60 : x
  2. Step 2: Convert to fraction form
    91,805.20/137,513.40 = 81,955.60/x
  3. Step 3: Cross multiply
    91,805.20x = 137,513.40 × 81,955.60
  4. Step 4: Simplify right side
    91,805.20x = 11,269,993,205.04
  5. Step 5: Solve for x
    x = 11,269,993,205.04/91,805.20
  6. Step 6: Final answer
    x = 122,759.86

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1.5x scale

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.