Home / 138,229.36-190,582.14-90,406.96

Finding the Fourth Proportional to 138,229.36, 190,582.14 and 90,406.96

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Solution

The fourth proportional to 138,229.36, 190,582.14 and 90,406.96 is: 124,647.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,229.36 : 190,582.14 = 90,406.96 : x
  2. Step 2: Convert to fraction form
    138,229.36/190,582.14 = 90,406.96/x
  3. Step 3: Cross multiply
    138,229.36x = 190,582.14 × 90,406.96
  4. Step 4: Simplify right side
    138,229.36x = 17,229,951,907.69
  5. Step 5: Solve for x
    x = 17,229,951,907.69/138,229.36
  6. Step 6: Final answer
    x = 124,647.56

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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.