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Finding the Fourth Proportional to 111,994.80, 154,552.50 and 61,693.80

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Solution

The fourth proportional to 111,994.80, 154,552.50 and 61,693.80 is: 85,137.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,994.80 : 154,552.50 = 61,693.80 : x
  2. Step 2: Convert to fraction form
    111,994.80/154,552.50 = 61,693.80/x
  3. Step 3: Cross multiply
    111,994.80x = 154,552.50 × 61,693.80
  4. Step 4: Simplify right side
    111,994.80x = 9,534,931,024.50
  5. Step 5: Solve for x
    x = 9,534,931,024.50/111,994.80
  6. Step 6: Final answer
    x = 85,137.27

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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.