Home / 81,428,442.76-122,142,586.38-20,844,071.56

Finding the Fourth Proportional to 81,428,442.76, 122,142,586.38 and 20,844,071.56

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Solution

The fourth proportional to 81,428,442.76, 122,142,586.38 and 20,844,071.56 is: 31,266,087.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,428,442.76 : 122,142,586.38 = 20,844,071.56 : x
  2. Step 2: Convert to fraction form
    81,428,442.76/122,142,586.38 = 20,844,071.56/x
  3. Step 3: Cross multiply
    81,428,442.76x = 122,142,586.38 × 20,844,071.56
  4. Step 4: Simplify right side
    81,428,442.76x = 2,545,948,811,028,201
  5. Step 5: Solve for x
    x = 2,545,948,811,028,201/81,428,442.76
  6. Step 6: Final answer
    x = 31,266,087.43

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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.