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Finding the Fourth Proportional to 50,728, 70,004.88 and 28,372

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Solution

The fourth proportional to 50,728, 70,004.88 and 28,372 is: 39,153.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,728 : 70,004.88 = 28,372 : x
  2. Step 2: Convert to fraction form
    50,728/70,004.88 = 28,372/x
  3. Step 3: Cross multiply
    50,728x = 70,004.88 × 28,372
  4. Step 4: Simplify right side
    50,728x = 1,986,178,455.36
  5. Step 5: Solve for x
    x = 1,986,178,455.36/50,728
  6. Step 6: Final answer
    x = 39,153.49

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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.