Home / 214,907,150.40-321,616,708.20-128,707,420.20

Finding the Fourth Proportional to 214,907,150.40, 321,616,708.20 and 128,707,420.20

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Solution

The fourth proportional to 214,907,150.40, 321,616,708.20 and 128,707,420.20 is: 192,615,539.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,907,150.40 : 321,616,708.20 = 128,707,420.20 : x
  2. Step 2: Convert to fraction form
    214,907,150.40/321,616,708.20 = 128,707,420.20/x
  3. Step 3: Cross multiply
    214,907,150.40x = 321,616,708.20 × 128,707,420.20
  4. Step 4: Simplify right side
    214,907,150.40x = 41,394,456,805,638,184
  5. Step 5: Solve for x
    x = 41,394,456,805,638,184/214,907,150.40
  6. Step 6: Final answer
    x = 192,615,539.91

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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.