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Finding the Fourth Proportional to 68,468.20, 102,702.30 and 31,604.20

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Solution

The fourth proportional to 68,468.20, 102,702.30 and 31,604.20 is: 47,406.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,468.20 : 102,702.30 = 31,604.20 : x
  2. Step 2: Convert to fraction form
    68,468.20/102,702.30 = 31,604.20/x
  3. Step 3: Cross multiply
    68,468.20x = 102,702.30 × 31,604.20
  4. Step 4: Simplify right side
    68,468.20x = 3,245,824,029.66
  5. Step 5: Solve for x
    x = 3,245,824,029.66/68,468.20
  6. Step 6: Final answer
    x = 47,406.30

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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.