Home / 81,431.38-122,127.76-45,908.43

Finding the Fourth Proportional to 81,431.38, 122,127.76 and 45,908.43

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Solution

The fourth proportional to 81,431.38, 122,127.76 and 45,908.43 is: 68,851.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,431.38 : 122,127.76 = 45,908.43 : x
  2. Step 2: Convert to fraction form
    81,431.38/122,127.76 = 45,908.43/x
  3. Step 3: Cross multiply
    81,431.38x = 122,127.76 × 45,908.43
  4. Step 4: Simplify right side
    81,431.38x = 5,606,693,721.02
  5. Step 5: Solve for x
    x = 5,606,693,721.02/81,431.38
  6. Step 6: Final answer
    x = 68,851.76

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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.