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Finding the Fourth Proportional to 111,956.64, 154,498.32 and 61,660.32

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Solution

The fourth proportional to 111,956.64, 154,498.32 and 61,660.32 is: 85,090.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,956.64 : 154,498.32 = 61,660.32 : x
  2. Step 2: Convert to fraction form
    111,956.64/154,498.32 = 61,660.32/x
  3. Step 3: Cross multiply
    111,956.64x = 154,498.32 × 61,660.32
  4. Step 4: Simplify right side
    111,956.64x = 9,526,415,850.66
  5. Step 5: Solve for x
    x = 9,526,415,850.66/111,956.64
  6. Step 6: Final answer
    x = 85,090.23

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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.