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Finding the Fourth Proportional to 111,956.72, 154,498.20 and 61,654.64

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Solution

The fourth proportional to 111,956.72, 154,498.20 and 61,654.64 is: 85,082.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,956.72 : 154,498.20 = 61,654.64 : x
  2. Step 2: Convert to fraction form
    111,956.72/154,498.20 = 61,654.64/x
  3. Step 3: Cross multiply
    111,956.72x = 154,498.20 × 61,654.64
  4. Step 4: Simplify right side
    111,956.72x = 9,525,530,901.65
  5. Step 5: Solve for x
    x = 9,525,530,901.65/111,956.72
  6. Step 6: Final answer
    x = 85,082.26

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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.