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Finding the Fourth Proportional to 111,069.84, 153,116.96 and 79,183.38

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Solution

The fourth proportional to 111,069.84, 153,116.96 and 79,183.38 is: 109,159.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,069.84 : 153,116.96 = 79,183.38 : x
  2. Step 2: Convert to fraction form
    111,069.84/153,116.96 = 79,183.38/x
  3. Step 3: Cross multiply
    111,069.84x = 153,116.96 × 79,183.38
  4. Step 4: Simplify right side
    111,069.84x = 12,124,318,428.12
  5. Step 5: Solve for x
    x = 12,124,318,428.12/111,069.84
  6. Step 6: Final answer
    x = 109,159.41

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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.