Home / 81,424,012.80-122,122,022.40-30,279,705.60

Finding the Fourth Proportional to 81,424,012.80, 122,122,022.40 and 30,279,705.60

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Solution

The fourth proportional to 81,424,012.80, 122,122,022.40 and 30,279,705.60 is: 45,414,353.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424,012.80 : 122,122,022.40 = 30,279,705.60 : x
  2. Step 2: Convert to fraction form
    81,424,012.80/122,122,022.40 = 30,279,705.60/x
  3. Step 3: Cross multiply
    81,424,012.80x = 122,122,022.40 × 30,279,705.60
  4. Step 4: Simplify right side
    81,424,012.80x = 3,697,818,885,548,606
  5. Step 5: Solve for x
    x = 3,697,818,885,548,606/81,424,012.80
  6. Step 6: Final answer
    x = 45,414,353.31

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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.