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Finding the Fourth Proportional to 99,447,805.60, 149,171,708.40 and 83,664,007.90

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Solution

The fourth proportional to 99,447,805.60, 149,171,708.40 and 83,664,007.90 is: 125,496,011.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,447,805.60 : 149,171,708.40 = 83,664,007.90 : x
  2. Step 2: Convert to fraction form
    99,447,805.60/149,171,708.40 = 83,664,007.90/x
  3. Step 3: Cross multiply
    99,447,805.60x = 149,171,708.40 × 83,664,007.90
  4. Step 4: Simplify right side
    99,447,805.60x = 12,480,302,990,034,098
  5. Step 5: Solve for x
    x = 12,480,302,990,034,098/99,447,805.60
  6. Step 6: Final answer
    x = 125,496,011.85

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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.