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Finding the Fourth Proportional to 68,114.79, 102,194.08 and 20,739.05

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Solution

The fourth proportional to 68,114.79, 102,194.08 and 20,739.05 is: 31,115.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,114.79 : 102,194.08 = 20,739.05 : x
  2. Step 2: Convert to fraction form
    68,114.79/102,194.08 = 20,739.05/x
  3. Step 3: Cross multiply
    68,114.79x = 102,194.08 × 20,739.05
  4. Step 4: Simplify right side
    68,114.79x = 2,119,408,588.40
  5. Step 5: Solve for x
    x = 2,119,408,588.40/68,114.79
  6. Step 6: Final answer
    x = 31,115.25

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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.