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Finding the Fourth Proportional to 50,709, 69,981.66 and 28,353

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Solution

The fourth proportional to 50,709, 69,981.66 and 28,353 is: 39,128.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,709 : 69,981.66 = 28,353 : x
  2. Step 2: Convert to fraction form
    50,709/69,981.66 = 28,353/x
  3. Step 3: Cross multiply
    50,709x = 69,981.66 × 28,353
  4. Step 4: Simplify right side
    50,709x = 1,984,190,005.98
  5. Step 5: Solve for x
    x = 1,984,190,005.98/50,709
  6. Step 6: Final answer
    x = 39,128.95

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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.