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Finding the Fourth Proportional to 445,628.78, 668,395.78 and 125,772.74

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Solution

The fourth proportional to 445,628.78, 668,395.78 and 125,772.74 is: 188,645.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,628.78 : 668,395.78 = 125,772.74 : x
  2. Step 2: Convert to fraction form
    445,628.78/668,395.78 = 125,772.74/x
  3. Step 3: Cross multiply
    445,628.78x = 668,395.78 × 125,772.74
  4. Step 4: Simplify right side
    445,628.78x = 84,065,968,655.04
  5. Step 5: Solve for x
    x = 84,065,968,655.04/445,628.78
  6. Step 6: Final answer
    x = 188,645.73

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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.