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Finding the Fourth Proportional to 445,448.94, 668,271.69 and 129,930.54

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Solution

The fourth proportional to 445,448.94, 668,271.69 and 129,930.54 is: 194,924.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,448.94 : 668,271.69 = 129,930.54 : x
  2. Step 2: Convert to fraction form
    445,448.94/668,271.69 = 129,930.54/x
  3. Step 3: Cross multiply
    445,448.94x = 668,271.69 × 129,930.54
  4. Step 4: Simplify right side
    445,448.94x = 86,828,901,548.41
  5. Step 5: Solve for x
    x = 86,828,901,548.41/445,448.94
  6. Step 6: Final answer
    x = 194,924.48

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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.