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Finding the Fourth Proportional to 48,696.76, 72,989.78 and 20,599.28

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Solution

The fourth proportional to 48,696.76, 72,989.78 and 20,599.28 is: 30,875.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,696.76 : 72,989.78 = 20,599.28 : x
  2. Step 2: Convert to fraction form
    48,696.76/72,989.78 = 20,599.28/x
  3. Step 3: Cross multiply
    48,696.76x = 72,989.78 × 20,599.28
  4. Step 4: Simplify right side
    48,696.76x = 1,503,536,721.12
  5. Step 5: Solve for x
    x = 1,503,536,721.12/48,696.76
  6. Step 6: Final answer
    x = 30,875.50

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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.