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Finding the Fourth Proportional to 68,659.80, 102,912.90 and 29,210.20

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Solution

The fourth proportional to 68,659.80, 102,912.90 and 29,210.20 is: 43,782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,659.80 : 102,912.90 = 29,210.20 : x
  2. Step 2: Convert to fraction form
    68,659.80/102,912.90 = 29,210.20/x
  3. Step 3: Cross multiply
    68,659.80x = 102,912.90 × 29,210.20
  4. Step 4: Simplify right side
    68,659.80x = 3,006,106,391.58
  5. Step 5: Solve for x
    x = 3,006,106,391.58/68,659.80
  6. Step 6: Final answer
    x = 43,782.63

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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.