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Finding the Fourth Proportional to 99,662,429.20, 149,493,643.80 and 45,809,741.20

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Solution

The fourth proportional to 99,662,429.20, 149,493,643.80 and 45,809,741.20 is: 68,714,611.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,662,429.20 : 149,493,643.80 = 45,809,741.20 : x
  2. Step 2: Convert to fraction form
    99,662,429.20/149,493,643.80 = 45,809,741.20/x
  3. Step 3: Cross multiply
    99,662,429.20x = 149,493,643.80 × 45,809,741.20
  4. Step 4: Simplify right side
    99,662,429.20x = 6,848,265,133,522,986
  5. Step 5: Solve for x
    x = 6,848,265,133,522,986/99,662,429.20
  6. Step 6: Final answer
    x = 68,714,611.80

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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.