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Finding the Fourth Proportional to 68,809.20, 103,172.64 and 23,815.80

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Solution

The fourth proportional to 68,809.20, 103,172.64 and 23,815.80 is: 35,709.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,809.20 : 103,172.64 = 23,815.80 : x
  2. Step 2: Convert to fraction form
    68,809.20/103,172.64 = 23,815.80/x
  3. Step 3: Cross multiply
    68,809.20x = 103,172.64 × 23,815.80
  4. Step 4: Simplify right side
    68,809.20x = 2,457,138,959.71
  5. Step 5: Solve for x
    x = 2,457,138,959.71/68,809.20
  6. Step 6: Final answer
    x = 35,709.45

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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.