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Finding the Fourth Proportional to 208,115.94, 287,199.90 and 117,490.71

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Solution

The fourth proportional to 208,115.94, 287,199.90 and 117,490.71 is: 162,137.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,115.94 : 287,199.90 = 117,490.71 : x
  2. Step 2: Convert to fraction form
    208,115.94/287,199.90 = 117,490.71/x
  3. Step 3: Cross multiply
    208,115.94x = 287,199.90 × 117,490.71
  4. Step 4: Simplify right side
    208,115.94x = 33,743,320,162.93
  5. Step 5: Solve for x
    x = 33,743,320,162.93/208,115.94
  6. Step 6: Final answer
    x = 162,137.12

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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.