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Finding the Fourth Proportional to 312,181.88, 430,812.05 and 168,941.88

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Solution

The fourth proportional to 312,181.88, 430,812.05 and 168,941.88 is: 233,140.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,181.88 : 430,812.05 = 168,941.88 : x
  2. Step 2: Convert to fraction form
    312,181.88/430,812.05 = 168,941.88/x
  3. Step 3: Cross multiply
    312,181.88x = 430,812.05 × 168,941.88
  4. Step 4: Simplify right side
    312,181.88x = 72,782,196,808.94
  5. Step 5: Solve for x
    x = 72,782,196,808.94/312,181.88
  6. Step 6: Final answer
    x = 233,140.37

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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.