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Finding the Fourth Proportional to 145,161.99, 200,333.40 and 80,638.59

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Solution

The fourth proportional to 145,161.99, 200,333.40 and 80,638.59 is: 111,286.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,161.99 : 200,333.40 = 80,638.59 : x
  2. Step 2: Convert to fraction form
    145,161.99/200,333.40 = 80,638.59/x
  3. Step 3: Cross multiply
    145,161.99x = 200,333.40 × 80,638.59
  4. Step 4: Simplify right side
    145,161.99x = 16,154,602,905.91
  5. Step 5: Solve for x
    x = 16,154,602,905.91/145,161.99
  6. Step 6: Final answer
    x = 111,286.73

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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.