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Finding the Fourth Proportional to 72,198.81, 99,594.36 and 41,980.77

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Solution

The fourth proportional to 72,198.81, 99,594.36 and 41,980.77 is: 57,910.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,198.81 : 99,594.36 = 41,980.77 : x
  2. Step 2: Convert to fraction form
    72,198.81/99,594.36 = 41,980.77/x
  3. Step 3: Cross multiply
    72,198.81x = 99,594.36 × 41,980.77
  4. Step 4: Simplify right side
    72,198.81x = 4,181,047,920.46
  5. Step 5: Solve for x
    x = 4,181,047,920.46/72,198.81
  6. Step 6: Final answer
    x = 57,910.21

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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.