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Finding the Fourth Proportional to 70,481.36, 105,774.61 and 28,361.82

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Solution

The fourth proportional to 70,481.36, 105,774.61 and 28,361.82 is: 42,563.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,481.36 : 105,774.61 = 28,361.82 : x
  2. Step 2: Convert to fraction form
    70,481.36/105,774.61 = 28,361.82/x
  3. Step 3: Cross multiply
    70,481.36x = 105,774.61 × 28,361.82
  4. Step 4: Simplify right side
    70,481.36x = 2,999,960,378.49
  5. Step 5: Solve for x
    x = 2,999,960,378.49/70,481.36
  6. Step 6: Final answer
    x = 42,563.88

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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.