Home / 90,998.20-125,997.42-83,999.80

Finding the Fourth Proportional to 90,998.20, 125,997.42 and 83,999.80

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Solution

The fourth proportional to 90,998.20, 125,997.42 and 83,999.80 is: 116,307.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,998.20 : 125,997.42 = 83,999.80 : x
  2. Step 2: Convert to fraction form
    90,998.20/125,997.42 = 83,999.80/x
  3. Step 3: Cross multiply
    90,998.20x = 125,997.42 × 83,999.80
  4. Step 4: Simplify right side
    90,998.20x = 10,583,758,080.52
  5. Step 5: Solve for x
    x = 10,583,758,080.52/90,998.20
  6. Step 6: Final answer
    x = 116,307.33

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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.