Home / 100,669.31-138,923.93-55,351.97

Finding the Fourth Proportional to 100,669.31, 138,923.93 and 55,351.97

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Solution

The fourth proportional to 100,669.31, 138,923.93 and 55,351.97 is: 76,385.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,669.31 : 138,923.93 = 55,351.97 : x
  2. Step 2: Convert to fraction form
    100,669.31/138,923.93 = 55,351.97/x
  3. Step 3: Cross multiply
    100,669.31x = 138,923.93 × 55,351.97
  4. Step 4: Simplify right side
    100,669.31x = 7,689,712,928.88
  5. Step 5: Solve for x
    x = 7,689,712,928.88/100,669.31
  6. Step 6: Final answer
    x = 76,385.87

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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.