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Finding the Fourth Proportional to 68,722.40, 103,023.60 and 26,631.20

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Solution

The fourth proportional to 68,722.40, 103,023.60 and 26,631.20 is: 39,923.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,722.40 : 103,023.60 = 26,631.20 : x
  2. Step 2: Convert to fraction form
    68,722.40/103,023.60 = 26,631.20/x
  3. Step 3: Cross multiply
    68,722.40x = 103,023.60 × 26,631.20
  4. Step 4: Simplify right side
    68,722.40x = 2,743,642,096.32
  5. Step 5: Solve for x
    x = 2,743,642,096.32/68,722.40
  6. Step 6: Final answer
    x = 39,923.55

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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.