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Finding the Fourth Proportional to 51,428.55, 70,977.97 and 28,768.80

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Solution

The fourth proportional to 51,428.55, 70,977.97 and 28,768.80 is: 39,704.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,428.55 : 70,977.97 = 28,768.80 : x
  2. Step 2: Convert to fraction form
    51,428.55/70,977.97 = 28,768.80/x
  3. Step 3: Cross multiply
    51,428.55x = 70,977.97 × 28,768.80
  4. Step 4: Simplify right side
    51,428.55x = 2,041,951,023.34
  5. Step 5: Solve for x
    x = 2,041,951,023.34/51,428.55
  6. Step 6: Final answer
    x = 39,704.62

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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.