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Finding the Fourth Proportional to 99,691,903.80, 149,285,913.30 and 79,536,511.80

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Solution

The fourth proportional to 99,691,903.80, 149,285,913.30 and 79,536,511.80 is: 119,103,762.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,691,903.80 : 149,285,913.30 = 79,536,511.80 : x
  2. Step 2: Convert to fraction form
    99,691,903.80/149,285,913.30 = 79,536,511.80/x
  3. Step 3: Cross multiply
    99,691,903.80x = 149,285,913.30 × 79,536,511.80
  4. Step 4: Simplify right side
    99,691,903.80x = 11,873,680,804,759,228
  5. Step 5: Solve for x
    x = 11,873,680,804,759,228/99,691,903.80
  6. Step 6: Final answer
    x = 119,103,762.21

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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.