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Finding the Fourth Proportional to 93,566.75, 128,987.68 and 66,662.55

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Solution

The fourth proportional to 93,566.75, 128,987.68 and 66,662.55 is: 91,898.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,566.75 : 128,987.68 = 66,662.55 : x
  2. Step 2: Convert to fraction form
    93,566.75/128,987.68 = 66,662.55/x
  3. Step 3: Cross multiply
    93,566.75x = 128,987.68 × 66,662.55
  4. Step 4: Simplify right side
    93,566.75x = 8,598,647,482.05
  5. Step 5: Solve for x
    x = 8,598,647,482.05/93,566.75
  6. Step 6: Final answer
    x = 91,898.54

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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.