Home / 78,732,076.70-118,098,115.05-68,654,380.70

Finding the Fourth Proportional to 78,732,076.70, 118,098,115.05 and 68,654,380.70

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Solution

The fourth proportional to 78,732,076.70, 118,098,115.05 and 68,654,380.70 is: 102,981,571.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,076.70 : 118,098,115.05 = 68,654,380.70 : x
  2. Step 2: Convert to fraction form
    78,732,076.70/118,098,115.05 = 68,654,380.70/x
  3. Step 3: Cross multiply
    78,732,076.70x = 118,098,115.05 × 68,654,380.70
  4. Step 4: Simplify right side
    78,732,076.70x = 8,107,952,950,595,100
  5. Step 5: Solve for x
    x = 8,107,952,950,595,100/78,732,076.70
  6. Step 6: Final answer
    x = 102,981,571.05

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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.