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Finding the Fourth Proportional to 72,825.44, 109,240.32 and 28,450.40

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Solution

The fourth proportional to 72,825.44, 109,240.32 and 28,450.40 is: 42,676.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,825.44 : 109,240.32 = 28,450.40 : x
  2. Step 2: Convert to fraction form
    72,825.44/109,240.32 = 28,450.40/x
  3. Step 3: Cross multiply
    72,825.44x = 109,240.32 × 28,450.40
  4. Step 4: Simplify right side
    72,825.44x = 3,107,930,800.13
  5. Step 5: Solve for x
    x = 3,107,930,800.13/72,825.44
  6. Step 6: Final answer
    x = 42,676.44

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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.