Home / 138,789.44-191,529.92-75,128

Finding the Fourth Proportional to 138,789.44, 191,529.92 and 75,128

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Solution

The fourth proportional to 138,789.44, 191,529.92 and 75,128 is: 103,676.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,789.44 : 191,529.92 = 75,128 : x
  2. Step 2: Convert to fraction form
    138,789.44/191,529.92 = 75,128/x
  3. Step 3: Cross multiply
    138,789.44x = 191,529.92 × 75,128
  4. Step 4: Simplify right side
    138,789.44x = 14,389,259,829.76
  5. Step 5: Solve for x
    x = 14,389,259,829.76/138,789.44
  6. Step 6: Final answer
    x = 103,676.91

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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.