Home / 81,193,300.30-121,789,950.45-78,801,815.80

Finding the Fourth Proportional to 81,193,300.30, 121,789,950.45 and 78,801,815.80

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Solution

The fourth proportional to 81,193,300.30, 121,789,950.45 and 78,801,815.80 is: 118,202,723.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,193,300.30 : 121,789,950.45 = 78,801,815.80 : x
  2. Step 2: Convert to fraction form
    81,193,300.30/121,789,950.45 = 78,801,815.80/x
  3. Step 3: Cross multiply
    81,193,300.30x = 121,789,950.45 × 78,801,815.80
  4. Step 4: Simplify right side
    81,193,300.30x = 9,597,269,241,652,026
  5. Step 5: Solve for x
    x = 9,597,269,241,652,026/81,193,300.30
  6. Step 6: Final answer
    x = 118,202,723.70

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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.