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Finding the Fourth Proportional to 50,715.75, 69,990.98 and 28,359.75

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Solution

The fourth proportional to 50,715.75, 69,990.98 and 28,359.75 is: 39,138.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,715.75 : 69,990.98 = 28,359.75 : x
  2. Step 2: Convert to fraction form
    50,715.75/69,990.98 = 28,359.75/x
  3. Step 3: Cross multiply
    50,715.75x = 69,990.98 × 28,359.75
  4. Step 4: Simplify right side
    50,715.75x = 1,984,926,553.26
  5. Step 5: Solve for x
    x = 1,984,926,553.26/50,715.75
  6. Step 6: Final answer
    x = 39,138.27

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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.