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Finding the Fourth Proportional to 69,915.60, 104,865.30 and 20,003.40

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Solution

The fourth proportional to 69,915.60, 104,865.30 and 20,003.40 is: 30,002.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,915.60 : 104,865.30 = 20,003.40 : x
  2. Step 2: Convert to fraction form
    69,915.60/104,865.30 = 20,003.40/x
  3. Step 3: Cross multiply
    69,915.60x = 104,865.30 × 20,003.40
  4. Step 4: Simplify right side
    69,915.60x = 2,097,662,542.02
  5. Step 5: Solve for x
    x = 2,097,662,542.02/69,915.60
  6. Step 6: Final answer
    x = 30,002.78

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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.