Home / 100,921.22-139,282.23-55,603.85

Finding the Fourth Proportional to 100,921.22, 139,282.23 and 55,603.85

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Solution

The fourth proportional to 100,921.22, 139,282.23 and 55,603.85 is: 76,739.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,921.22 : 139,282.23 = 55,603.85 : x
  2. Step 2: Convert to fraction form
    100,921.22/139,282.23 = 55,603.85/x
  3. Step 3: Cross multiply
    100,921.22x = 139,282.23 × 55,603.85
  4. Step 4: Simplify right side
    100,921.22x = 7,744,628,224.59
  5. Step 5: Solve for x
    x = 7,744,628,224.59/100,921.22
  6. Step 6: Final answer
    x = 76,739.34

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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.