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Finding the Fourth Proportional to 51,321.21, 70,819.23 and 28,658.43

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Solution

The fourth proportional to 51,321.21, 70,819.23 and 28,658.43 is: 39,546.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,321.21 : 70,819.23 = 28,658.43 : x
  2. Step 2: Convert to fraction form
    51,321.21/70,819.23 = 28,658.43/x
  3. Step 3: Cross multiply
    51,321.21x = 70,819.23 × 28,658.43
  4. Step 4: Simplify right side
    51,321.21x = 2,029,567,945.61
  5. Step 5: Solve for x
    x = 2,029,567,945.61/51,321.21
  6. Step 6: Final answer
    x = 39,546.38

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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.