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Finding the Fourth Proportional to 111,993.12, 154,544.22 and 64,242

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Solution

The fourth proportional to 111,993.12, 154,544.22 and 64,242 is: 88,650.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,993.12 : 154,544.22 = 64,242 : x
  2. Step 2: Convert to fraction form
    111,993.12/154,544.22 = 64,242/x
  3. Step 3: Cross multiply
    111,993.12x = 154,544.22 × 64,242
  4. Step 4: Simplify right side
    111,993.12x = 9,928,229,781.24
  5. Step 5: Solve for x
    x = 9,928,229,781.24/111,993.12
  6. Step 6: Final answer
    x = 88,650.35

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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.