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Finding the Fourth Proportional to 70,246.56, 105,369.95 and 28,693.56

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Solution

The fourth proportional to 70,246.56, 105,369.95 and 28,693.56 is: 43,040.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,246.56 : 105,369.95 = 28,693.56 : x
  2. Step 2: Convert to fraction form
    70,246.56/105,369.95 = 28,693.56/x
  3. Step 3: Cross multiply
    70,246.56x = 105,369.95 × 28,693.56
  4. Step 4: Simplify right side
    70,246.56x = 3,023,438,982.52
  5. Step 5: Solve for x
    x = 3,023,438,982.52/70,246.56
  6. Step 6: Final answer
    x = 43,040.38

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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.