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Finding the Fourth Proportional to 208,168.28, 287,326.05 and 135,751.68

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Solution

The fourth proportional to 208,168.28, 287,326.05 and 135,751.68 is: 187,372.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,168.28 : 287,326.05 = 135,751.68 : x
  2. Step 2: Convert to fraction form
    208,168.28/287,326.05 = 135,751.68/x
  3. Step 3: Cross multiply
    208,168.28x = 287,326.05 × 135,751.68
  4. Step 4: Simplify right side
    208,168.28x = 39,004,994,563.67
  5. Step 5: Solve for x
    x = 39,004,994,563.67/208,168.28
  6. Step 6: Final answer
    x = 187,372.42

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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.