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Finding the Fourth Proportional to 70,008,760.60, 105,013,140.90 and 18,890,697.40

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Solution

The fourth proportional to 70,008,760.60, 105,013,140.90 and 18,890,697.40 is: 28,336,046.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,008,760.60 : 105,013,140.90 = 18,890,697.40 : x
  2. Step 2: Convert to fraction form
    70,008,760.60/105,013,140.90 = 18,890,697.40/x
  3. Step 3: Cross multiply
    70,008,760.60x = 105,013,140.90 × 18,890,697.40
  4. Step 4: Simplify right side
    70,008,760.60x = 1,983,771,467,765,463.50
  5. Step 5: Solve for x
    x = 1,983,771,467,765,463.50/70,008,760.60
  6. Step 6: Final answer
    x = 28,336,046.10

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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.