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Finding the Fourth Proportional to 145,600.80, 200,932.08 and 81,938.40

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Solution

The fourth proportional to 145,600.80, 200,932.08 and 81,938.40 is: 113,076.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,600.80 : 200,932.08 = 81,938.40 : x
  2. Step 2: Convert to fraction form
    145,600.80/200,932.08 = 81,938.40/x
  3. Step 3: Cross multiply
    145,600.80x = 200,932.08 × 81,938.40
  4. Step 4: Simplify right side
    145,600.80x = 16,464,053,143.87
  5. Step 5: Solve for x
    x = 16,464,053,143.87/145,600.80
  6. Step 6: Final answer
    x = 113,076.67

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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.