Home / 81,255.40-121,883.10-73,997.80

Finding the Fourth Proportional to 81,255.40, 121,883.10 and 73,997.80

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Solution

The fourth proportional to 81,255.40, 121,883.10 and 73,997.80 is: 110,996.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255.40 : 121,883.10 = 73,997.80 : x
  2. Step 2: Convert to fraction form
    81,255.40/121,883.10 = 73,997.80/x
  3. Step 3: Cross multiply
    81,255.40x = 121,883.10 × 73,997.80
  4. Step 4: Simplify right side
    81,255.40x = 9,019,081,257.18
  5. Step 5: Solve for x
    x = 9,019,081,257.18/81,255.40
  6. Step 6: Final answer
    x = 110,996.70

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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.