Home / 128,616,005.20-193,147,956.60-68,149,829.20

Finding the Fourth Proportional to 128,616,005.20, 193,147,956.60 and 68,149,829.20

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Solution

The fourth proportional to 128,616,005.20, 193,147,956.60 and 68,149,829.20 is: 102,343,407.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,616,005.20 : 193,147,956.60 = 68,149,829.20 : x
  2. Step 2: Convert to fraction form
    128,616,005.20/193,147,956.60 = 68,149,829.20/x
  3. Step 3: Cross multiply
    128,616,005.20x = 193,147,956.60 × 68,149,829.20
  4. Step 4: Simplify right side
    128,616,005.20x = 13,163,000,252,619,012
  5. Step 5: Solve for x
    x = 13,163,000,252,619,012/128,616,005.20
  6. Step 6: Final answer
    x = 102,343,407.67

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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.