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Finding the Fourth Proportional to 99,662,430.20, 149,493,645.30 and 45,809,742.20

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Solution

The fourth proportional to 99,662,430.20, 149,493,645.30 and 45,809,742.20 is: 68,714,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,662,430.20 : 149,493,645.30 = 45,809,742.20 : x
  2. Step 2: Convert to fraction form
    99,662,430.20/149,493,645.30 = 45,809,742.20/x
  3. Step 3: Cross multiply
    99,662,430.20x = 149,493,645.30 × 45,809,742.20
  4. Step 4: Simplify right side
    99,662,430.20x = 6,848,265,351,731,243
  5. Step 5: Solve for x
    x = 6,848,265,351,731,243/99,662,430.20
  6. Step 6: Final answer
    x = 68,714,613.30

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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.