Home / 85,481,420.14-128,220,331.99-20,785,556.98

Finding the Fourth Proportional to 85,481,420.14, 128,220,331.99 and 20,785,556.98

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Solution

The fourth proportional to 85,481,420.14, 128,220,331.99 and 20,785,556.98 is: 31,177,898.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,481,420.14 : 128,220,331.99 = 20,785,556.98 : x
  2. Step 2: Convert to fraction form
    85,481,420.14/128,220,331.99 = 20,785,556.98/x
  3. Step 3: Cross multiply
    85,481,420.14x = 128,220,331.99 × 20,785,556.98
  4. Step 4: Simplify right side
    85,481,420.14x = 2,665,131,016,572,661.50
  5. Step 5: Solve for x
    x = 2,665,131,016,572,661.50/85,481,420.14
  6. Step 6: Final answer
    x = 31,177,898.22

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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.