Home / 138,961.37-191,741.41-77,708.69

Finding the Fourth Proportional to 138,961.37, 191,741.41 and 77,708.69

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Solution

The fourth proportional to 138,961.37, 191,741.41 and 77,708.69 is: 107,223.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,961.37 : 191,741.41 = 77,708.69 : x
  2. Step 2: Convert to fraction form
    138,961.37/191,741.41 = 77,708.69/x
  3. Step 3: Cross multiply
    138,961.37x = 191,741.41 × 77,708.69
  4. Step 4: Simplify right side
    138,961.37x = 14,899,973,789.85
  5. Step 5: Solve for x
    x = 14,899,973,789.85/138,961.37
  6. Step 6: Final answer
    x = 107,223.86

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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.