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Finding the Fourth Proportional to 58,689.21, 80,964.71 and 39,562.83

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Solution

The fourth proportional to 58,689.21, 80,964.71 and 39,562.83 is: 54,578.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,689.21 : 80,964.71 = 39,562.83 : x
  2. Step 2: Convert to fraction form
    58,689.21/80,964.71 = 39,562.83/x
  3. Step 3: Cross multiply
    58,689.21x = 80,964.71 × 39,562.83
  4. Step 4: Simplify right side
    58,689.21x = 3,203,193,230.82
  5. Step 5: Solve for x
    x = 3,203,193,230.82/58,689.21
  6. Step 6: Final answer
    x = 54,578.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.