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Finding the Fourth Proportional to 111,693.60, 154,135.44 and 61,391.52

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Solution

The fourth proportional to 111,693.60, 154,135.44 and 61,391.52 is: 84,719.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,693.60 : 154,135.44 = 61,391.52 : x
  2. Step 2: Convert to fraction form
    111,693.60/154,135.44 = 61,391.52/x
  3. Step 3: Cross multiply
    111,693.60x = 154,135.44 × 61,391.52
  4. Step 4: Simplify right side
    111,693.60x = 9,462,608,947.47
  5. Step 5: Solve for x
    x = 9,462,608,947.47/111,693.60
  6. Step 6: Final answer
    x = 84,719.35

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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.