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Finding the Fourth Proportional to 68,840.01, 103,261.16 and 18,919.80

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Solution

The fourth proportional to 68,840.01, 103,261.16 and 18,919.80 is: 28,380.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,840.01 : 103,261.16 = 18,919.80 : x
  2. Step 2: Convert to fraction form
    68,840.01/103,261.16 = 18,919.80/x
  3. Step 3: Cross multiply
    68,840.01x = 103,261.16 × 18,919.80
  4. Step 4: Simplify right side
    68,840.01x = 1,953,680,494.97
  5. Step 5: Solve for x
    x = 1,953,680,494.97/68,840.01
  6. Step 6: Final answer
    x = 28,380.01

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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.