Home / 100,864.28-139,189.66-55,542.36

Finding the Fourth Proportional to 100,864.28, 139,189.66 and 55,542.36

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Solution

The fourth proportional to 100,864.28, 139,189.66 and 55,542.36 is: 76,646.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,864.28 : 139,189.66 = 55,542.36 : x
  2. Step 2: Convert to fraction form
    100,864.28/139,189.66 = 55,542.36/x
  3. Step 3: Cross multiply
    100,864.28x = 139,189.66 × 55,542.36
  4. Step 4: Simplify right side
    100,864.28x = 7,730,922,204.00
  5. Step 5: Solve for x
    x = 7,730,922,204.00/100,864.28
  6. Step 6: Final answer
    x = 76,646.78

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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.