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Finding the Fourth Proportional to 171,905.40, 257,639.40 and 82,967.40

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Solution

The fourth proportional to 171,905.40, 257,639.40 and 82,967.40 is: 124,345.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,905.40 : 257,639.40 = 82,967.40 : x
  2. Step 2: Convert to fraction form
    171,905.40/257,639.40 = 82,967.40/x
  3. Step 3: Cross multiply
    171,905.40x = 257,639.40 × 82,967.40
  4. Step 4: Simplify right side
    171,905.40x = 21,375,671,155.56
  5. Step 5: Solve for x
    x = 21,375,671,155.56/171,905.40
  6. Step 6: Final answer
    x = 124,345.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.