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Finding the Fourth Proportional to 70,928.44, 106,408.24 and 21,012.45

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Solution

The fourth proportional to 70,928.44, 106,408.24 and 21,012.45 is: 31,523.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,928.44 : 106,408.24 = 21,012.45 : x
  2. Step 2: Convert to fraction form
    70,928.44/106,408.24 = 21,012.45/x
  3. Step 3: Cross multiply
    70,928.44x = 106,408.24 × 21,012.45
  4. Step 4: Simplify right side
    70,928.44x = 2,235,897,331.63
  5. Step 5: Solve for x
    x = 2,235,897,331.63/70,928.44
  6. Step 6: Final answer
    x = 31,523.28

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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.