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Finding the Fourth Proportional to 68,698.80, 103,048.20 and 29,259.90

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Solution

The fourth proportional to 68,698.80, 103,048.20 and 29,259.90 is: 43,889.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,698.80 : 103,048.20 = 29,259.90 : x
  2. Step 2: Convert to fraction form
    68,698.80/103,048.20 = 29,259.90/x
  3. Step 3: Cross multiply
    68,698.80x = 103,048.20 × 29,259.90
  4. Step 4: Simplify right side
    68,698.80x = 3,015,180,027.18
  5. Step 5: Solve for x
    x = 3,015,180,027.18/68,698.80
  6. Step 6: Final answer
    x = 43,889.85

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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.