Home / 81,193,300.80-121,789,951.20-78,801,816.30

Finding the Fourth Proportional to 81,193,300.80, 121,789,951.20 and 78,801,816.30

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Solution

The fourth proportional to 81,193,300.80, 121,789,951.20 and 78,801,816.30 is: 118,202,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,193,300.80 : 121,789,951.20 = 78,801,816.30 : x
  2. Step 2: Convert to fraction form
    81,193,300.80/121,789,951.20 = 78,801,816.30/x
  3. Step 3: Cross multiply
    81,193,300.80x = 121,789,951.20 × 78,801,816.30
  4. Step 4: Simplify right side
    81,193,300.80x = 9,597,269,361,648,364
  5. Step 5: Solve for x
    x = 9,597,269,361,648,364/81,193,300.80
  6. Step 6: Final answer
    x = 118,202,724.45

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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.