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Finding the Fourth Proportional to 89,739.40, 134,609.10 and 68,744.20

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Solution

The fourth proportional to 89,739.40, 134,609.10 and 68,744.20 is: 103,116.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,739.40 : 134,609.10 = 68,744.20 : x
  2. Step 2: Convert to fraction form
    89,739.40/134,609.10 = 68,744.20/x
  3. Step 3: Cross multiply
    89,739.40x = 134,609.10 × 68,744.20
  4. Step 4: Simplify right side
    89,739.40x = 9,253,594,892.22
  5. Step 5: Solve for x
    x = 9,253,594,892.22/89,739.40
  6. Step 6: Final answer
    x = 103,116.30

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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.