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Finding the Fourth Proportional to 445,554.90, 668,371.64 and 125,709.56

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Solution

The fourth proportional to 445,554.90, 668,371.64 and 125,709.56 is: 188,575.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,554.90 : 668,371.64 = 125,709.56 : x
  2. Step 2: Convert to fraction form
    445,554.90/668,371.64 = 125,709.56/x
  3. Step 3: Cross multiply
    445,554.90x = 668,371.64 × 125,709.56
  4. Step 4: Simplify right side
    445,554.90x = 84,020,704,780.88
  5. Step 5: Solve for x
    x = 84,020,704,780.88/445,554.90
  6. Step 6: Final answer
    x = 188,575.43

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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.