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Finding the Fourth Proportional to 68,492.80, 102,724.80 and 29,051.20

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Solution

The fourth proportional to 68,492.80, 102,724.80 and 29,051.20 is: 43,570.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,492.80 : 102,724.80 = 29,051.20 : x
  2. Step 2: Convert to fraction form
    68,492.80/102,724.80 = 29,051.20/x
  3. Step 3: Cross multiply
    68,492.80x = 102,724.80 × 29,051.20
  4. Step 4: Simplify right side
    68,492.80x = 2,984,278,709.76
  5. Step 5: Solve for x
    x = 2,984,278,709.76/68,492.80
  6. Step 6: Final answer
    x = 43,570.69

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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.