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Finding the Fourth Proportional to 67,305.95, 100,959.32 and 20,558.82

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Solution

The fourth proportional to 67,305.95, 100,959.32 and 20,558.82 is: 30,838.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,305.95 : 100,959.32 = 20,558.82 : x
  2. Step 2: Convert to fraction form
    67,305.95/100,959.32 = 20,558.82/x
  3. Step 3: Cross multiply
    67,305.95x = 100,959.32 × 20,558.82
  4. Step 4: Simplify right side
    67,305.95x = 2,075,604,538.60
  5. Step 5: Solve for x
    x = 2,075,604,538.60/67,305.95
  6. Step 6: Final answer
    x = 30,838.35

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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.