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Finding the Fourth Proportional to 445,462.90, 668,135.06 and 125,640.45

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Solution

The fourth proportional to 445,462.90, 668,135.06 and 125,640.45 is: 188,443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,462.90 : 668,135.06 = 125,640.45 : x
  2. Step 2: Convert to fraction form
    445,462.90/668,135.06 = 125,640.45/x
  3. Step 3: Cross multiply
    445,462.90x = 668,135.06 × 125,640.45
  4. Step 4: Simplify right side
    445,462.90x = 83,944,789,913.28
  5. Step 5: Solve for x
    x = 83,944,789,913.28/445,462.90
  6. Step 6: Final answer
    x = 188,443.95

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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.