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Finding the Fourth Proportional to 208,280.87, 312,356.70 and 75,143.82

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Solution

The fourth proportional to 208,280.87, 312,356.70 and 75,143.82 is: 112,692.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,280.87 : 312,356.70 = 75,143.82 : x
  2. Step 2: Convert to fraction form
    208,280.87/312,356.70 = 75,143.82/x
  3. Step 3: Cross multiply
    208,280.87x = 312,356.70 × 75,143.82
  4. Step 4: Simplify right side
    208,280.87x = 23,471,675,640.59
  5. Step 5: Solve for x
    x = 23,471,675,640.59/208,280.87
  6. Step 6: Final answer
    x = 112,692.42

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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.