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Finding the Fourth Proportional to 139,474.74, 209,200.26 and 55,211.99

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Solution

The fourth proportional to 139,474.74, 209,200.26 and 55,211.99 is: 82,813.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,474.74 : 209,200.26 = 55,211.99 : x
  2. Step 2: Convert to fraction form
    139,474.74/209,200.26 = 55,211.99/x
  3. Step 3: Cross multiply
    139,474.74x = 209,200.26 × 55,211.99
  4. Step 4: Simplify right side
    139,474.74x = 11,550,362,663.12
  5. Step 5: Solve for x
    x = 11,550,362,663.12/139,474.74
  6. Step 6: Final answer
    x = 82,813.29

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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.