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Finding the Fourth Proportional to 139,978,800.45, 209,968,200.68 and 139,978,800.45

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Solution

The fourth proportional to 139,978,800.45, 209,968,200.68 and 139,978,800.45 is: 209,968,200.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,978,800.45 : 209,968,200.68 = 139,978,800.45 : x
  2. Step 2: Convert to fraction form
    139,978,800.45/209,968,200.68 = 139,978,800.45/x
  3. Step 3: Cross multiply
    139,978,800.45x = 209,968,200.68 × 139,978,800.45
  4. Step 4: Simplify right side
    139,978,800.45x = 29,391,096,863,131,380
  5. Step 5: Solve for x
    x = 29,391,096,863,131,380/139,978,800.45
  6. Step 6: Final answer
    x = 209,968,200.68

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1.5x scale

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.