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Finding the Fourth Proportional to 57,406.50, 86,110.94 and 20,890.23

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Solution

The fourth proportional to 57,406.50, 86,110.94 and 20,890.23 is: 31,335.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,406.50 : 86,110.94 = 20,890.23 : x
  2. Step 2: Convert to fraction form
    57,406.50/86,110.94 = 20,890.23/x
  3. Step 3: Cross multiply
    57,406.50x = 86,110.94 × 20,890.23
  4. Step 4: Simplify right side
    57,406.50x = 1,798,877,074.61
  5. Step 5: Solve for x
    x = 1,798,877,074.61/57,406.50
  6. Step 6: Final answer
    x = 31,335.77

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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.