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Finding the Fourth Proportional to 111,930.64, 154,464.44 and 61,629.64

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Solution

The fourth proportional to 111,930.64, 154,464.44 and 61,629.64 is: 85,048.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,930.64 : 154,464.44 = 61,629.64 : x
  2. Step 2: Convert to fraction form
    111,930.64/154,464.44 = 61,629.64/x
  3. Step 3: Cross multiply
    111,930.64x = 154,464.44 × 61,629.64
  4. Step 4: Simplify right side
    111,930.64x = 9,519,587,830.00
  5. Step 5: Solve for x
    x = 9,519,587,830.00/111,930.64
  6. Step 6: Final answer
    x = 85,048.99

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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.