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Finding the Fourth Proportional to 445,019.76, 667,672.20 and 129,495.60

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Solution

The fourth proportional to 445,019.76, 667,672.20 and 129,495.60 is: 194,284.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,019.76 : 667,672.20 = 129,495.60 : x
  2. Step 2: Convert to fraction form
    445,019.76/667,672.20 = 129,495.60/x
  3. Step 3: Cross multiply
    445,019.76x = 667,672.20 × 129,495.60
  4. Step 4: Simplify right side
    445,019.76x = 86,460,612,142.32
  5. Step 5: Solve for x
    x = 86,460,612,142.32/445,019.76
  6. Step 6: Final answer
    x = 194,284.88

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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.