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Finding the Fourth Proportional to 208,472.73, 287,791.56 and 139,680.66

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Solution

The fourth proportional to 208,472.73, 287,791.56 and 139,680.66 is: 192,825.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,472.73 : 287,791.56 = 139,680.66 : x
  2. Step 2: Convert to fraction form
    208,472.73/287,791.56 = 139,680.66/x
  3. Step 3: Cross multiply
    208,472.73x = 287,791.56 × 139,680.66
  4. Step 4: Simplify right side
    208,472.73x = 40,198,915,043.23
  5. Step 5: Solve for x
    x = 40,198,915,043.23/208,472.73
  6. Step 6: Final answer
    x = 192,825.77

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1.5x scale

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.