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Finding the Fourth Proportional to 445,254.99, 667,889.78 and 129,729.21

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Solution

The fourth proportional to 445,254.99, 667,889.78 and 129,729.21 is: 194,595.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,254.99 : 667,889.78 = 129,729.21 : x
  2. Step 2: Convert to fraction form
    445,254.99/667,889.78 = 129,729.21/x
  3. Step 3: Cross multiply
    445,254.99x = 667,889.78 × 129,729.21
  4. Step 4: Simplify right side
    445,254.99x = 86,644,812,877.83
  5. Step 5: Solve for x
    x = 86,644,812,877.83/445,254.99
  6. Step 6: Final answer
    x = 194,595.94

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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.