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Finding the Fourth Proportional to 57,880.50, 79,839.35 and 39,722.94

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Solution

The fourth proportional to 57,880.50, 79,839.35 and 39,722.94 is: 54,793.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,880.50 : 79,839.35 = 39,722.94 : x
  2. Step 2: Convert to fraction form
    57,880.50/79,839.35 = 39,722.94/x
  3. Step 3: Cross multiply
    57,880.50x = 79,839.35 × 39,722.94
  4. Step 4: Simplify right side
    57,880.50x = 3,171,453,511.07
  5. Step 5: Solve for x
    x = 3,171,453,511.07/57,880.50
  6. Step 6: Final answer
    x = 54,793.13

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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.