Home / 105,121.25-145,083.94-66,840.90

Finding the Fourth Proportional to 105,121.25, 145,083.94 and 66,840.90

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Solution

The fourth proportional to 105,121.25, 145,083.94 and 66,840.90 is: 92,251.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,121.25 : 145,083.94 = 66,840.90 : x
  2. Step 2: Convert to fraction form
    105,121.25/145,083.94 = 66,840.90/x
  3. Step 3: Cross multiply
    105,121.25x = 145,083.94 × 66,840.90
  4. Step 4: Simplify right side
    105,121.25x = 9,697,540,789.96
  5. Step 5: Solve for x
    x = 9,697,540,789.96/105,121.25
  6. Step 6: Final answer
    x = 92,251.00

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1.5x scale

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.