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Finding the Fourth Proportional to 139,523.88, 209,299.50 and 55,280.64

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Solution

The fourth proportional to 139,523.88, 209,299.50 and 55,280.64 is: 82,926.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,523.88 : 209,299.50 = 55,280.64 : x
  2. Step 2: Convert to fraction form
    139,523.88/209,299.50 = 55,280.64/x
  3. Step 3: Cross multiply
    139,523.88x = 209,299.50 × 55,280.64
  4. Step 4: Simplify right side
    139,523.88x = 11,570,210,311.68
  5. Step 5: Solve for x
    x = 11,570,210,311.68/139,523.88
  6. Step 6: Final answer
    x = 82,926.38

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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.