Home / 85,321,406.40-127,982,109.60-84,471,100.80

Finding the Fourth Proportional to 85,321,406.40, 127,982,109.60 and 84,471,100.80

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Solution

The fourth proportional to 85,321,406.40, 127,982,109.60 and 84,471,100.80 is: 126,706,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,321,406.40 : 127,982,109.60 = 84,471,100.80 : x
  2. Step 2: Convert to fraction form
    85,321,406.40/127,982,109.60 = 84,471,100.80/x
  3. Step 3: Cross multiply
    85,321,406.40x = 127,982,109.60 × 84,471,100.80
  4. Step 4: Simplify right side
    85,321,406.40x = 10,810,789,680,618,246
  5. Step 5: Solve for x
    x = 10,810,789,680,618,246/85,321,406.40
  6. Step 6: Final answer
    x = 126,706,651.20

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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.