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Finding the Fourth Proportional to 111,035.81, 166,479.73 and 61,139.40

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Solution

The fourth proportional to 111,035.81, 166,479.73 and 61,139.40 is: 91,668.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,035.81 : 166,479.73 = 61,139.40 : x
  2. Step 2: Convert to fraction form
    111,035.81/166,479.73 = 61,139.40/x
  3. Step 3: Cross multiply
    111,035.81x = 166,479.73 × 61,139.40
  4. Step 4: Simplify right side
    111,035.81x = 10,178,470,804.36
  5. Step 5: Solve for x
    x = 10,178,470,804.36/111,035.81
  6. Step 6: Final answer
    x = 91,668.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.