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Finding the Fourth Proportional to 129,612.38, 178,865.08 and 69,996.38

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Solution

The fourth proportional to 129,612.38, 178,865.08 and 69,996.38 is: 96,595.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,612.38 : 178,865.08 = 69,996.38 : x
  2. Step 2: Convert to fraction form
    129,612.38/178,865.08 = 69,996.38/x
  3. Step 3: Cross multiply
    129,612.38x = 178,865.08 × 69,996.38
  4. Step 4: Simplify right side
    129,612.38x = 12,519,907,039.09
  5. Step 5: Solve for x
    x = 12,519,907,039.09/129,612.38
  6. Step 6: Final answer
    x = 96,595.00

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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.