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Finding the Fourth Proportional to 70,040.99, 105,012.87 and 25,661.63

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Solution

The fourth proportional to 70,040.99, 105,012.87 and 25,661.63 is: 38,474.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,040.99 : 105,012.87 = 25,661.63 : x
  2. Step 2: Convert to fraction form
    70,040.99/105,012.87 = 25,661.63/x
  3. Step 3: Cross multiply
    70,040.99x = 105,012.87 × 25,661.63
  4. Step 4: Simplify right side
    70,040.99x = 2,694,800,890.11
  5. Step 5: Solve for x
    x = 2,694,800,890.11/70,040.99
  6. Step 6: Final answer
    x = 38,474.63

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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.