Home / 100,744.36-139,021.72-55,415.02

Finding the Fourth Proportional to 100,744.36, 139,021.72 and 55,415.02

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Solution

The fourth proportional to 100,744.36, 139,021.72 and 55,415.02 is: 76,469.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,744.36 : 139,021.72 = 55,415.02 : x
  2. Step 2: Convert to fraction form
    100,744.36/139,021.72 = 55,415.02/x
  3. Step 3: Cross multiply
    100,744.36x = 139,021.72 × 55,415.02
  4. Step 4: Simplify right side
    100,744.36x = 7,703,891,637.28
  5. Step 5: Solve for x
    x = 7,703,891,637.28/100,744.36
  6. Step 6: Final answer
    x = 76,469.71

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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.