Home / 138,801.68-191,546.93-75,139.48

Finding the Fourth Proportional to 138,801.68, 191,546.93 and 75,139.48

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Solution

The fourth proportional to 138,801.68, 191,546.93 and 75,139.48 is: 103,692.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,801.68 : 191,546.93 = 75,139.48 : x
  2. Step 2: Convert to fraction form
    138,801.68/191,546.93 = 75,139.48/x
  3. Step 3: Cross multiply
    138,801.68x = 191,546.93 × 75,139.48
  4. Step 4: Simplify right side
    138,801.68x = 14,392,735,758.06
  5. Step 5: Solve for x
    x = 14,392,735,758.06/138,801.68
  6. Step 6: Final answer
    x = 103,692.81

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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.