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Finding the Fourth Proportional to 93,178.85, 128,583.30 and 56,940.89

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Solution

The fourth proportional to 93,178.85, 128,583.30 and 56,940.89 is: 78,576.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,178.85 : 128,583.30 = 56,940.89 : x
  2. Step 2: Convert to fraction form
    93,178.85/128,583.30 = 56,940.89/x
  3. Step 3: Cross multiply
    93,178.85x = 128,583.30 × 56,940.89
  4. Step 4: Simplify right side
    93,178.85x = 7,321,647,522.76
  5. Step 5: Solve for x
    x = 7,321,647,522.76/93,178.85
  6. Step 6: Final answer
    x = 78,576.28

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1.5x scale

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.