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Finding the Fourth Proportional to 68,719.80, 103,109.04 and 29,295.48

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Solution

The fourth proportional to 68,719.80, 103,109.04 and 29,295.48 is: 43,955.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,719.80 : 103,109.04 = 29,295.48 : x
  2. Step 2: Convert to fraction form
    68,719.80/103,109.04 = 29,295.48/x
  3. Step 3: Cross multiply
    68,719.80x = 103,109.04 × 29,295.48
  4. Step 4: Simplify right side
    68,719.80x = 3,020,628,819.14
  5. Step 5: Solve for x
    x = 3,020,628,819.14/68,719.80
  6. Step 6: Final answer
    x = 43,955.73

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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.