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Finding the Fourth Proportional to 139,409,627.80, 209,114,441.70 and 48,503,003.80

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Solution

The fourth proportional to 139,409,627.80, 209,114,441.70 and 48,503,003.80 is: 72,754,505.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,409,627.80 : 209,114,441.70 = 48,503,003.80 : x
  2. Step 2: Convert to fraction form
    139,409,627.80/209,114,441.70 = 48,503,003.80/x
  3. Step 3: Cross multiply
    139,409,627.80x = 209,114,441.70 × 48,503,003.80
  4. Step 4: Simplify right side
    139,409,627.80x = 10,142,678,560,409,978
  5. Step 5: Solve for x
    x = 10,142,678,560,409,978/139,409,627.80
  6. Step 6: Final answer
    x = 72,754,505.70

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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.