Home / 100,986.75-139,360.95-55,664.73

Finding the Fourth Proportional to 100,986.75, 139,360.95 and 55,664.73

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Solution

The fourth proportional to 100,986.75, 139,360.95 and 55,664.73 is: 76,816.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,986.75 : 139,360.95 = 55,664.73 : x
  2. Step 2: Convert to fraction form
    100,986.75/139,360.95 = 55,664.73/x
  3. Step 3: Cross multiply
    100,986.75x = 139,360.95 × 55,664.73
  4. Step 4: Simplify right side
    100,986.75x = 7,757,489,654.29
  5. Step 5: Solve for x
    x = 7,757,489,654.29/100,986.75
  6. Step 6: Final answer
    x = 76,816.91

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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.