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Finding the Fourth Proportional to 139,968,400.60, 209,952,600.90 and 105,200,349.40

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Solution

The fourth proportional to 139,968,400.60, 209,952,600.90 and 105,200,349.40 is: 157,800,524.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,400.60 : 209,952,600.90 = 105,200,349.40 : x
  2. Step 2: Convert to fraction form
    139,968,400.60/209,952,600.90 = 105,200,349.40/x
  3. Step 3: Cross multiply
    139,968,400.60x = 209,952,600.90 × 105,200,349.40
  4. Step 4: Simplify right side
    139,968,400.60x = 22,087,086,972,118,756
  5. Step 5: Solve for x
    x = 22,087,086,972,118,756/139,968,400.60
  6. Step 6: Final answer
    x = 157,800,524.10

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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.