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Finding the Fourth Proportional to 93,696.54, 129,213.59 and 74,639.67

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Solution

The fourth proportional to 93,696.54, 129,213.59 and 74,639.67 is: 102,932.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,696.54 : 129,213.59 = 74,639.67 : x
  2. Step 2: Convert to fraction form
    93,696.54/129,213.59 = 74,639.67/x
  3. Step 3: Cross multiply
    93,696.54x = 129,213.59 × 74,639.67
  4. Step 4: Simplify right side
    93,696.54x = 9,644,459,071.05
  5. Step 5: Solve for x
    x = 9,644,459,071.05/93,696.54
  6. Step 6: Final answer
    x = 102,932.93

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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.