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Finding the Fourth Proportional to 138,801.79, 191,546.43 and 75,139.54

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Solution

The fourth proportional to 138,801.79, 191,546.43 and 75,139.54 is: 103,692.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,801.79 : 191,546.43 = 75,139.54 : x
  2. Step 2: Convert to fraction form
    138,801.79/191,546.43 = 75,139.54/x
  3. Step 3: Cross multiply
    138,801.79x = 191,546.43 × 75,139.54
  4. Step 4: Simplify right side
    138,801.79x = 14,392,710,638.84
  5. Step 5: Solve for x
    x = 14,392,710,638.84/138,801.79
  6. Step 6: Final answer
    x = 103,692.54

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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.