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Finding the Fourth Proportional to 51,269.68, 76,914.78 and 21,687.40

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Solution

The fourth proportional to 51,269.68, 76,914.78 and 21,687.40 is: 32,535.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,269.68 : 76,914.78 = 21,687.40 : x
  2. Step 2: Convert to fraction form
    51,269.68/76,914.78 = 21,687.40/x
  3. Step 3: Cross multiply
    51,269.68x = 76,914.78 × 21,687.40
  4. Step 4: Simplify right side
    51,269.68x = 1,668,081,599.77
  5. Step 5: Solve for x
    x = 1,668,081,599.77/51,269.68
  6. Step 6: Final answer
    x = 32,535.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.