Home / 128,615,999.20-193,147,947.60-68,149,823.20

Finding the Fourth Proportional to 128,615,999.20, 193,147,947.60 and 68,149,823.20

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Solution

The fourth proportional to 128,615,999.20, 193,147,947.60 and 68,149,823.20 is: 102,343,398.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,615,999.20 : 193,147,947.60 = 68,149,823.20 : x
  2. Step 2: Convert to fraction form
    128,615,999.20/193,147,947.60 = 68,149,823.20/x
  3. Step 3: Cross multiply
    128,615,999.20x = 193,147,947.60 × 68,149,823.20
  4. Step 4: Simplify right side
    128,615,999.20x = 13,162,998,480,382,864
  5. Step 5: Solve for x
    x = 13,162,998,480,382,864/128,615,999.20
  6. Step 6: Final answer
    x = 102,343,398.66

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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.