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Finding the Fourth Proportional to 208,377.61, 287,372.15 and 136,730.41

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Solution

The fourth proportional to 208,377.61, 287,372.15 and 136,730.41 is: 188,563.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,377.61 : 287,372.15 = 136,730.41 : x
  2. Step 2: Convert to fraction form
    208,377.61/287,372.15 = 136,730.41/x
  3. Step 3: Cross multiply
    208,377.61x = 287,372.15 × 136,730.41
  4. Step 4: Simplify right side
    208,377.61x = 39,292,511,208.43
  5. Step 5: Solve for x
    x = 39,292,511,208.43/208,377.61
  6. Step 6: Final answer
    x = 188,563.98

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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.