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Finding the Fourth Proportional to 68,048,978.68, 93,907,739.10 and 38,680,491.16

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Solution

The fourth proportional to 68,048,978.68, 93,907,739.10 and 38,680,491.16 is: 53,379,162.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,048,978.68 : 93,907,739.10 = 38,680,491.16 : x
  2. Step 2: Convert to fraction form
    68,048,978.68/93,907,739.10 = 38,680,491.16/x
  3. Step 3: Cross multiply
    68,048,978.68x = 93,907,739.10 × 38,680,491.16
  4. Step 4: Simplify right side
    68,048,978.68x = 3,632,397,472,113,136
  5. Step 5: Solve for x
    x = 3,632,397,472,113,136/68,048,978.68
  6. Step 6: Final answer
    x = 53,379,162.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.