Home / 138,393.36-190,943.33-77,942.86

Finding the Fourth Proportional to 138,393.36, 190,943.33 and 77,942.86

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Solution

The fourth proportional to 138,393.36, 190,943.33 and 77,942.86 is: 107,538.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,393.36 : 190,943.33 = 77,942.86 : x
  2. Step 2: Convert to fraction form
    138,393.36/190,943.33 = 77,942.86/x
  3. Step 3: Cross multiply
    138,393.36x = 190,943.33 × 77,942.86
  4. Step 4: Simplify right side
    138,393.36x = 14,882,668,371.05
  5. Step 5: Solve for x
    x = 14,882,668,371.05/138,393.36
  6. Step 6: Final answer
    x = 107,538.89

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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.