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Finding the Fourth Proportional to 111,865.86, 154,374.93 and 61,564.50

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Solution

The fourth proportional to 111,865.86, 154,374.93 and 61,564.50 is: 84,959.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,865.86 : 154,374.93 = 61,564.50 : x
  2. Step 2: Convert to fraction form
    111,865.86/154,374.93 = 61,564.50/x
  3. Step 3: Cross multiply
    111,865.86x = 154,374.93 × 61,564.50
  4. Step 4: Simplify right side
    111,865.86x = 9,504,015,377.99
  5. Step 5: Solve for x
    x = 9,504,015,377.99/111,865.86
  6. Step 6: Final answer
    x = 84,959.03

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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.