Home / 99,901.44-137,772.60-78,100.56

Finding the Fourth Proportional to 99,901.44, 137,772.60 and 78,100.56

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Solution

The fourth proportional to 99,901.44, 137,772.60 and 78,100.56 is: 107,707.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,901.44 : 137,772.60 = 78,100.56 : x
  2. Step 2: Convert to fraction form
    99,901.44/137,772.60 = 78,100.56/x
  3. Step 3: Cross multiply
    99,901.44x = 137,772.60 × 78,100.56
  4. Step 4: Simplify right side
    99,901.44x = 10,760,117,212.66
  5. Step 5: Solve for x
    x = 10,760,117,212.66/99,901.44
  6. Step 6: Final answer
    x = 107,707.33

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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.