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Finding the Fourth Proportional to 51,265, 70,745.70 and 28,910.44

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Solution

The fourth proportional to 51,265, 70,745.70 and 28,910.44 is: 39,896.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,265 : 70,745.70 = 28,910.44 : x
  2. Step 2: Convert to fraction form
    51,265/70,745.70 = 28,910.44/x
  3. Step 3: Cross multiply
    51,265x = 70,745.70 × 28,910.44
  4. Step 4: Simplify right side
    51,265x = 2,045,289,315.11
  5. Step 5: Solve for x
    x = 2,045,289,315.11/51,265
  6. Step 6: Final answer
    x = 39,896.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.