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Finding the Fourth Proportional to 111,609.36, 154,020.24 and 61,308

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Solution

The fourth proportional to 111,609.36, 154,020.24 and 61,308 is: 84,604.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,609.36 : 154,020.24 = 61,308 : x
  2. Step 2: Convert to fraction form
    111,609.36/154,020.24 = 61,308/x
  3. Step 3: Cross multiply
    111,609.36x = 154,020.24 × 61,308
  4. Step 4: Simplify right side
    111,609.36x = 9,442,672,873.92
  5. Step 5: Solve for x
    x = 9,442,672,873.92/111,609.36
  6. Step 6: Final answer
    x = 84,604.67

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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.