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Finding the Fourth Proportional to 51,321.46, 70,819.57 and 28,658.68

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Solution

The fourth proportional to 51,321.46, 70,819.57 and 28,658.68 is: 39,546.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,321.46 : 70,819.57 = 28,658.68 : x
  2. Step 2: Convert to fraction form
    51,321.46/70,819.57 = 28,658.68/x
  3. Step 3: Cross multiply
    51,321.46x = 70,819.57 × 28,658.68
  4. Step 4: Simplify right side
    51,321.46x = 2,029,595,394.37
  5. Step 5: Solve for x
    x = 2,029,595,394.37/51,321.46
  6. Step 6: Final answer
    x = 39,546.72

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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.