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Finding the Fourth Proportional to 208,466.73, 287,783.28 and 139,674.66

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Solution

The fourth proportional to 208,466.73, 287,783.28 and 139,674.66 is: 192,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,466.73 : 287,783.28 = 139,674.66 : x
  2. Step 2: Convert to fraction form
    208,466.73/287,783.28 = 139,674.66/x
  3. Step 3: Cross multiply
    208,466.73x = 287,783.28 × 139,674.66
  4. Step 4: Simplify right side
    208,466.73x = 40,196,031,787.68
  5. Step 5: Solve for x
    x = 40,196,031,787.68/208,466.73
  6. Step 6: Final answer
    x = 192,817.49

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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.