Home / 128,615,935.20-193,147,851.60-68,149,759.20

Finding the Fourth Proportional to 128,615,935.20, 193,147,851.60 and 68,149,759.20

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Solution

The fourth proportional to 128,615,935.20, 193,147,851.60 and 68,149,759.20 is: 102,343,302.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,615,935.20 : 193,147,851.60 = 68,149,759.20 : x
  2. Step 2: Convert to fraction form
    128,615,935.20/193,147,851.60 = 68,149,759.20/x
  3. Step 3: Cross multiply
    128,615,935.20x = 193,147,851.60 × 68,149,759.20
  4. Step 4: Simplify right side
    128,615,935.20x = 13,162,979,576,537,334
  5. Step 5: Solve for x
    x = 13,162,979,576,537,334/128,615,935.20
  6. Step 6: Final answer
    x = 102,343,302.61

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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.