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Finding the Fourth Proportional to 171,353.80, 256,953.90 and 77,811.40

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Solution

The fourth proportional to 171,353.80, 256,953.90 and 77,811.40 is: 116,682.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,353.80 : 256,953.90 = 77,811.40 : x
  2. Step 2: Convert to fraction form
    171,353.80/256,953.90 = 77,811.40/x
  3. Step 3: Cross multiply
    171,353.80x = 256,953.90 × 77,811.40
  4. Step 4: Simplify right side
    171,353.80x = 19,993,942,694.46
  5. Step 5: Solve for x
    x = 19,993,942,694.46/171,353.80
  6. Step 6: Final answer
    x = 116,682.23

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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.