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Finding the Fourth Proportional to 99,855,221.80, 149,782,832.70 and 61,392,015.40

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Solution

The fourth proportional to 99,855,221.80, 149,782,832.70 and 61,392,015.40 is: 92,088,023.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,855,221.80 : 149,782,832.70 = 61,392,015.40 : x
  2. Step 2: Convert to fraction form
    99,855,221.80/149,782,832.70 = 61,392,015.40/x
  3. Step 3: Cross multiply
    99,855,221.80x = 149,782,832.70 × 61,392,015.40
  4. Step 4: Simplify right side
    99,855,221.80x = 9,195,469,971,774,022
  5. Step 5: Solve for x
    x = 9,195,469,971,774,022/99,855,221.80
  6. Step 6: Final answer
    x = 92,088,023.10

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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.