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Finding the Fourth Proportional to 208,208.88, 287,317.31 and 122,155.88

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Solution

The fourth proportional to 208,208.88, 287,317.31 and 122,155.88 is: 168,568.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,208.88 : 287,317.31 = 122,155.88 : x
  2. Step 2: Convert to fraction form
    208,208.88/287,317.31 = 122,155.88/x
  3. Step 3: Cross multiply
    208,208.88x = 287,317.31 × 122,155.88
  4. Step 4: Simplify right side
    208,208.88x = 35,097,496,794.92
  5. Step 5: Solve for x
    x = 35,097,496,794.92/208,208.88
  6. Step 6: Final answer
    x = 168,568.68

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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.