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Finding the Fourth Proportional to 64,724.70, 89,347.68 and 43,516.32

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Solution

The fourth proportional to 64,724.70, 89,347.68 and 43,516.32 is: 60,071.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,724.70 : 89,347.68 = 43,516.32 : x
  2. Step 2: Convert to fraction form
    64,724.70/89,347.68 = 43,516.32/x
  3. Step 3: Cross multiply
    64,724.70x = 89,347.68 × 43,516.32
  4. Step 4: Simplify right side
    64,724.70x = 3,888,082,234.14
  5. Step 5: Solve for x
    x = 3,888,082,234.14/64,724.70
  6. Step 6: Final answer
    x = 60,071.07

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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.