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Finding the Fourth Proportional to 279,937,441.80, 420,116,114.70 and 143,552,622.60

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Solution

The fourth proportional to 279,937,441.80, 420,116,114.70 and 143,552,622.60 is: 215,436,597.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,937,441.80 : 420,116,114.70 = 143,552,622.60 : x
  2. Step 2: Convert to fraction form
    279,937,441.80/420,116,114.70 = 143,552,622.60/x
  3. Step 3: Cross multiply
    279,937,441.80x = 420,116,114.70 × 143,552,622.60
  4. Step 4: Simplify right side
    279,937,441.80x = 60,308,770,061,707,408
  5. Step 5: Solve for x
    x = 60,308,770,061,707,408/279,937,441.80
  6. Step 6: Final answer
    x = 215,436,597.81

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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.