Home / 100,551.15-138,761.72-55,230.19

Finding the Fourth Proportional to 100,551.15, 138,761.72 and 55,230.19

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Solution

The fourth proportional to 100,551.15, 138,761.72 and 55,230.19 is: 76,218.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,551.15 : 138,761.72 = 55,230.19 : x
  2. Step 2: Convert to fraction form
    100,551.15/138,761.72 = 55,230.19/x
  3. Step 3: Cross multiply
    100,551.15x = 138,761.72 × 55,230.19
  4. Step 4: Simplify right side
    100,551.15x = 7,663,836,160.33
  5. Step 5: Solve for x
    x = 7,663,836,160.33/100,551.15
  6. Step 6: Final answer
    x = 76,218.28

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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.