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Finding the Fourth Proportional to 103,563.20, 154,104.40 and 103,213.28

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Solution

The fourth proportional to 103,563.20, 154,104.40 and 103,213.28 is: 153,583.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,563.20 : 154,104.40 = 103,213.28 : x
  2. Step 2: Convert to fraction form
    103,563.20/154,104.40 = 103,213.28/x
  3. Step 3: Cross multiply
    103,563.20x = 154,104.40 × 103,213.28
  4. Step 4: Simplify right side
    103,563.20x = 15,905,620,586.43
  5. Step 5: Solve for x
    x = 15,905,620,586.43/103,563.20
  6. Step 6: Final answer
    x = 153,583.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.