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Finding the Fourth Proportional to 139,410,829.80, 209,116,244.70 and 48,504,205.80

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Solution

The fourth proportional to 139,410,829.80, 209,116,244.70 and 48,504,205.80 is: 72,756,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,410,829.80 : 209,116,244.70 = 48,504,205.80 : x
  2. Step 2: Convert to fraction form
    139,410,829.80/209,116,244.70 = 48,504,205.80/x
  3. Step 3: Cross multiply
    139,410,829.80x = 209,116,244.70 × 48,504,205.80
  4. Step 4: Simplify right side
    139,410,829.80x = 10,143,017,369,051,958
  5. Step 5: Solve for x
    x = 10,143,017,369,051,958/139,410,829.80
  6. Step 6: Final answer
    x = 72,756,308.70

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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.