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Finding the Fourth Proportional to 51,180.87, 70,631.78 and 28,519.88

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Solution

The fourth proportional to 51,180.87, 70,631.78 and 28,519.88 is: 39,358.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,180.87 : 70,631.78 = 28,519.88 : x
  2. Step 2: Convert to fraction form
    51,180.87/70,631.78 = 28,519.88/x
  3. Step 3: Cross multiply
    51,180.87x = 70,631.78 × 28,519.88
  4. Step 4: Simplify right side
    51,180.87x = 2,014,409,923.77
  5. Step 5: Solve for x
    x = 2,014,409,923.77/51,180.87
  6. Step 6: Final answer
    x = 39,358.65

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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.