Home / 100,939.21-139,302.43-55,617.18

Finding the Fourth Proportional to 100,939.21, 139,302.43 and 55,617.18

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Solution

The fourth proportional to 100,939.21, 139,302.43 and 55,617.18 is: 76,755.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,939.21 : 139,302.43 = 55,617.18 : x
  2. Step 2: Convert to fraction form
    100,939.21/139,302.43 = 55,617.18/x
  3. Step 3: Cross multiply
    100,939.21x = 139,302.43 × 55,617.18
  4. Step 4: Simplify right side
    100,939.21x = 7,747,608,758.74
  5. Step 5: Solve for x
    x = 7,747,608,758.74/100,939.21
  6. Step 6: Final answer
    x = 76,755.19

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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.