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Finding the Fourth Proportional to 120,859.91, 166,776.91 and 69,875.92

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Solution

The fourth proportional to 120,859.91, 166,776.91 and 69,875.92 is: 96,423.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,859.91 : 166,776.91 = 69,875.92 : x
  2. Step 2: Convert to fraction form
    120,859.91/166,776.91 = 69,875.92/x
  3. Step 3: Cross multiply
    120,859.91x = 166,776.91 × 69,875.92
  4. Step 4: Simplify right side
    120,859.91x = 11,653,690,245.75
  5. Step 5: Solve for x
    x = 11,653,690,245.75/120,859.91
  6. Step 6: Final answer
    x = 96,423.13

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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.