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Finding the Fourth Proportional to 139,692.93, 209,462.84 and 55,367.67

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Solution

The fourth proportional to 139,692.93, 209,462.84 and 55,367.67 is: 83,021.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,692.93 : 209,462.84 = 55,367.67 : x
  2. Step 2: Convert to fraction form
    139,692.93/209,462.84 = 55,367.67/x
  3. Step 3: Cross multiply
    139,692.93x = 209,462.84 × 55,367.67
  4. Step 4: Simplify right side
    139,692.93x = 11,597,469,402.38
  5. Step 5: Solve for x
    x = 11,597,469,402.38/139,692.93
  6. Step 6: Final answer
    x = 83,021.16

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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.