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Finding the Fourth Proportional to 138,872.79, 208,310.40 and 33,692.67

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Solution

The fourth proportional to 138,872.79, 208,310.40 and 33,692.67 is: 50,539.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872.79 : 208,310.40 = 33,692.67 : x
  2. Step 2: Convert to fraction form
    138,872.79/208,310.40 = 33,692.67/x
  3. Step 3: Cross multiply
    138,872.79x = 208,310.40 × 33,692.67
  4. Step 4: Simplify right side
    138,872.79x = 7,018,533,564.77
  5. Step 5: Solve for x
    x = 7,018,533,564.77/138,872.79
  6. Step 6: Final answer
    x = 50,539.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.