Home / 100,939.72-139,303.13-55,617.68

Finding the Fourth Proportional to 100,939.72, 139,303.13 and 55,617.68

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Solution

The fourth proportional to 100,939.72, 139,303.13 and 55,617.68 is: 76,755.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,939.72 : 139,303.13 = 55,617.68 : x
  2. Step 2: Convert to fraction form
    100,939.72/139,303.13 = 55,617.68/x
  3. Step 3: Cross multiply
    100,939.72x = 139,303.13 × 55,617.68
  4. Step 4: Simplify right side
    100,939.72x = 7,747,716,629.25
  5. Step 5: Solve for x
    x = 7,747,716,629.25/100,939.72
  6. Step 6: Final answer
    x = 76,755.88

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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.