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Finding the Fourth Proportional to 139,803.98, 209,690.27 and 38,616.41

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Solution

The fourth proportional to 139,803.98, 209,690.27 and 38,616.41 is: 57,920.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,803.98 : 209,690.27 = 38,616.41 : x
  2. Step 2: Convert to fraction form
    139,803.98/209,690.27 = 38,616.41/x
  3. Step 3: Cross multiply
    139,803.98x = 209,690.27 × 38,616.41
  4. Step 4: Simplify right side
    139,803.98x = 8,097,485,915.29
  5. Step 5: Solve for x
    x = 8,097,485,915.29/139,803.98
  6. Step 6: Final answer
    x = 57,920.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.