Home / 81,245,189.28-121,867,914.96-28,761,912.48

Finding the Fourth Proportional to 81,245,189.28, 121,867,914.96 and 28,761,912.48

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Solution

The fourth proportional to 81,245,189.28, 121,867,914.96 and 28,761,912.48 is: 43,142,915.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,245,189.28 : 121,867,914.96 = 28,761,912.48 : x
  2. Step 2: Convert to fraction form
    81,245,189.28/121,867,914.96 = 28,761,912.48/x
  3. Step 3: Cross multiply
    81,245,189.28x = 121,867,914.96 × 28,761,912.48
  4. Step 4: Simplify right side
    81,245,189.28x = 3,505,154,304,199,602.50
  5. Step 5: Solve for x
    x = 3,505,154,304,199,602.50/81,245,189.28
  6. Step 6: Final answer
    x = 43,142,915.11

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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.