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Finding the Fourth Proportional to 139,968,367.20, 209,924,557.20 and 67,185,007.20

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Solution

The fourth proportional to 139,968,367.20, 209,924,557.20 and 67,185,007.20 is: 100,764,073.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,367.20 : 209,924,557.20 = 67,185,007.20 : x
  2. Step 2: Convert to fraction form
    139,968,367.20/209,924,557.20 = 67,185,007.20/x
  3. Step 3: Cross multiply
    139,968,367.20x = 209,924,557.20 × 67,185,007.20
  4. Step 4: Simplify right side
    139,968,367.20x = 14,103,782,886,938,812
  5. Step 5: Solve for x
    x = 14,103,782,886,938,812/139,968,367.20
  6. Step 6: Final answer
    x = 100,764,073.83

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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.