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Finding the Fourth Proportional to 68,868.89, 103,303.77 and 18,954.26

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Solution

The fourth proportional to 68,868.89, 103,303.77 and 18,954.26 is: 28,431.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,868.89 : 103,303.77 = 18,954.26 : x
  2. Step 2: Convert to fraction form
    68,868.89/103,303.77 = 18,954.26/x
  3. Step 3: Cross multiply
    68,868.89x = 103,303.77 × 18,954.26
  4. Step 4: Simplify right side
    68,868.89x = 1,958,046,515.56
  5. Step 5: Solve for x
    x = 1,958,046,515.56/68,868.89
  6. Step 6: Final answer
    x = 28,431.51

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1.5x scale

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.