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Finding the Fourth Proportional to 50,711.56, 69,981.90 and 28,355.56

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Solution

The fourth proportional to 50,711.56, 69,981.90 and 28,355.56 is: 39,130.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,711.56 : 69,981.90 = 28,355.56 : x
  2. Step 2: Convert to fraction form
    50,711.56/69,981.90 = 28,355.56/x
  3. Step 3: Cross multiply
    50,711.56x = 69,981.90 × 28,355.56
  4. Step 4: Simplify right side
    50,711.56x = 1,984,375,964.36
  5. Step 5: Solve for x
    x = 1,984,375,964.36/50,711.56
  6. Step 6: Final answer
    x = 39,130.64

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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.