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Finding the Fourth Proportional to 68,806.20, 103,112.10 and 48,005.40

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Solution

The fourth proportional to 68,806.20, 103,112.10 and 48,005.40 is: 71,940.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,806.20 : 103,112.10 = 48,005.40 : x
  2. Step 2: Convert to fraction form
    68,806.20/103,112.10 = 48,005.40/x
  3. Step 3: Cross multiply
    68,806.20x = 103,112.10 × 48,005.40
  4. Step 4: Simplify right side
    68,806.20x = 4,949,937,605.34
  5. Step 5: Solve for x
    x = 4,949,937,605.34/68,806.20
  6. Step 6: Final answer
    x = 71,940.28

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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.