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Finding the Fourth Proportional to 80,871.65, 111,603.92 and 46,421.94

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Solution

The fourth proportional to 80,871.65, 111,603.92 and 46,421.94 is: 64,062.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,871.65 : 111,603.92 = 46,421.94 : x
  2. Step 2: Convert to fraction form
    80,871.65/111,603.92 = 46,421.94/x
  3. Step 3: Cross multiply
    80,871.65x = 111,603.92 × 46,421.94
  4. Step 4: Simplify right side
    80,871.65x = 5,180,870,594.06
  5. Step 5: Solve for x
    x = 5,180,870,594.06/80,871.65
  6. Step 6: Final answer
    x = 64,062.88

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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.