Home / 100,884.12-139,214.58-55,553.49

Finding the Fourth Proportional to 100,884.12, 139,214.58 and 55,553.49

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Solution

The fourth proportional to 100,884.12, 139,214.58 and 55,553.49 is: 76,660.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,884.12 : 139,214.58 = 55,553.49 : x
  2. Step 2: Convert to fraction form
    100,884.12/139,214.58 = 55,553.49/x
  3. Step 3: Cross multiply
    100,884.12x = 139,214.58 × 55,553.49
  4. Step 4: Simplify right side
    100,884.12x = 7,733,855,777.88
  5. Step 5: Solve for x
    x = 7,733,855,777.88/100,884.12
  6. Step 6: Final answer
    x = 76,660.78

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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.