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Finding the Fourth Proportional to 54,311.80, 81,408.30 and 19,233.40

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Solution

The fourth proportional to 54,311.80, 81,408.30 and 19,233.40 is: 28,829.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,311.80 : 81,408.30 = 19,233.40 : x
  2. Step 2: Convert to fraction form
    54,311.80/81,408.30 = 19,233.40/x
  3. Step 3: Cross multiply
    54,311.80x = 81,408.30 × 19,233.40
  4. Step 4: Simplify right side
    54,311.80x = 1,565,758,397.22
  5. Step 5: Solve for x
    x = 1,565,758,397.22/54,311.80
  6. Step 6: Final answer
    x = 28,829.06

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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.