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Finding the Fourth Proportional to 49,920,061.20, 70,089,639.60 and 49,920,061.20

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Solution

The fourth proportional to 49,920,061.20, 70,089,639.60 and 49,920,061.20 is: 70,089,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,920,061.20 : 70,089,639.60 = 49,920,061.20 : x
  2. Step 2: Convert to fraction form
    49,920,061.20/70,089,639.60 = 49,920,061.20/x
  3. Step 3: Cross multiply
    49,920,061.20x = 70,089,639.60 × 49,920,061.20
  4. Step 4: Simplify right side
    49,920,061.20x = 3,498,879,098,317,943.50
  5. Step 5: Solve for x
    x = 3,498,879,098,317,943.50/49,920,061.20
  6. Step 6: Final answer
    x = 70,089,639.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.