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Finding the Fourth Proportional to 216,790.32, 325,216.80 and 67,042.96

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Solution

The fourth proportional to 216,790.32, 325,216.80 and 67,042.96 is: 100,574.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,790.32 : 325,216.80 = 67,042.96 : x
  2. Step 2: Convert to fraction form
    216,790.32/325,216.80 = 67,042.96/x
  3. Step 3: Cross multiply
    216,790.32x = 325,216.80 × 67,042.96
  4. Step 4: Simplify right side
    216,790.32x = 21,803,496,913.73
  5. Step 5: Solve for x
    x = 21,803,496,913.73/216,790.32
  6. Step 6: Final answer
    x = 100,574.13

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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.