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Finding the Fourth Proportional to 70,007,830.60, 105,011,745.90 and 18,889,767.40

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Solution

The fourth proportional to 70,007,830.60, 105,011,745.90 and 18,889,767.40 is: 28,334,651.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,007,830.60 : 105,011,745.90 = 18,889,767.40 : x
  2. Step 2: Convert to fraction form
    70,007,830.60/105,011,745.90 = 18,889,767.40/x
  3. Step 3: Cross multiply
    70,007,830.60x = 105,011,745.90 × 18,889,767.40
  4. Step 4: Simplify right side
    70,007,830.60x = 1,983,647,454,318,903.50
  5. Step 5: Solve for x
    x = 1,983,647,454,318,903.50/70,007,830.60
  6. Step 6: Final answer
    x = 28,334,651.10

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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.