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Finding the Fourth Proportional to 171,667.95, 257,515.94 and 86,234.87

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Solution

The fourth proportional to 171,667.95, 257,515.94 and 86,234.87 is: 129,359.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,667.95 : 257,515.94 = 86,234.87 : x
  2. Step 2: Convert to fraction form
    171,667.95/257,515.94 = 86,234.87/x
  3. Step 3: Cross multiply
    171,667.95x = 257,515.94 × 86,234.87
  4. Step 4: Simplify right side
    171,667.95x = 22,206,851,890.07
  5. Step 5: Solve for x
    x = 22,206,851,890.07/171,667.95
  6. Step 6: Final answer
    x = 129,359.34

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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.