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Finding the Fourth Proportional to 103,813,819.80, 155,720,729.70 and 103,813,819.80

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Solution

The fourth proportional to 103,813,819.80, 155,720,729.70 and 103,813,819.80 is: 155,720,729.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,813,819.80 : 155,720,729.70 = 103,813,819.80 : x
  2. Step 2: Convert to fraction form
    103,813,819.80/155,720,729.70 = 103,813,819.80/x
  3. Step 3: Cross multiply
    103,813,819.80x = 155,720,729.70 × 103,813,819.80
  4. Step 4: Simplify right side
    103,813,819.80x = 16,165,963,772,200,306
  5. Step 5: Solve for x
    x = 16,165,963,772,200,306/103,813,819.80
  6. Step 6: Final answer
    x = 155,720,729.70

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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.