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Finding the Fourth Proportional to 70,008,751.91, 105,013,127.87 and 18,890,688.71

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Solution

The fourth proportional to 70,008,751.91, 105,013,127.87 and 18,890,688.71 is: 28,336,033.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,008,751.91 : 105,013,127.87 = 18,890,688.71 : x
  2. Step 2: Convert to fraction form
    70,008,751.91/105,013,127.87 = 18,890,688.71/x
  3. Step 3: Cross multiply
    70,008,751.91x = 105,013,127.87 × 18,890,688.71
  4. Step 4: Simplify right side
    70,008,751.91x = 1,983,770,309,294,514.75
  5. Step 5: Solve for x
    x = 1,983,770,309,294,514.75/70,008,751.91
  6. Step 6: Final answer
    x = 28,336,033.07

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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.