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Finding the Fourth Proportional to 138,961.20, 191,692.50 and 84,530.02

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Solution

The fourth proportional to 138,961.20, 191,692.50 and 84,530.02 is: 116,606.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,961.20 : 191,692.50 = 84,530.02 : x
  2. Step 2: Convert to fraction form
    138,961.20/191,692.50 = 84,530.02/x
  3. Step 3: Cross multiply
    138,961.20x = 191,692.50 × 84,530.02
  4. Step 4: Simplify right side
    138,961.20x = 16,203,770,858.85
  5. Step 5: Solve for x
    x = 16,203,770,858.85/138,961.20
  6. Step 6: Final answer
    x = 116,606.44

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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.