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Finding the Fourth Proportional to 28,619,770.77, 39,491,695.40 and 19,347,516.09

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Solution

The fourth proportional to 28,619,770.77, 39,491,695.40 and 19,347,516.09 is: 26,697,146.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,619,770.77 : 39,491,695.40 = 19,347,516.09 : x
  2. Step 2: Convert to fraction form
    28,619,770.77/39,491,695.40 = 19,347,516.09/x
  3. Step 3: Cross multiply
    28,619,770.77x = 39,491,695.40 × 19,347,516.09
  4. Step 4: Simplify right side
    28,619,770.77x = 764,066,212,076,141.50
  5. Step 5: Solve for x
    x = 764,066,212,076,141.50/28,619,770.77
  6. Step 6: Final answer
    x = 26,697,146.47

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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.