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Finding the Fourth Proportional to 208,977.85, 288,435.36 and 137,364.54

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Solution

The fourth proportional to 208,977.85, 288,435.36 and 137,364.54 is: 189,593.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,977.85 : 288,435.36 = 137,364.54 : x
  2. Step 2: Convert to fraction form
    208,977.85/288,435.36 = 137,364.54/x
  3. Step 3: Cross multiply
    208,977.85x = 288,435.36 × 137,364.54
  4. Step 4: Simplify right side
    208,977.85x = 39,620,790,546.13
  5. Step 5: Solve for x
    x = 39,620,790,546.13/208,977.85
  6. Step 6: Final answer
    x = 189,593.25

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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.