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Finding the Fourth Proportional to 445,483.44, 668,170.80 and 129,940.56

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Solution

The fourth proportional to 445,483.44, 668,170.80 and 129,940.56 is: 194,894.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,483.44 : 668,170.80 = 129,940.56 : x
  2. Step 2: Convert to fraction form
    445,483.44/668,170.80 = 129,940.56/x
  3. Step 3: Cross multiply
    445,483.44x = 668,170.80 × 129,940.56
  4. Step 4: Simplify right side
    445,483.44x = 86,822,487,927.65
  5. Step 5: Solve for x
    x = 86,822,487,927.65/445,483.44
  6. Step 6: Final answer
    x = 194,894.98

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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.