Home / 81,872.78-122,343.04-61,476.56

Finding the Fourth Proportional to 81,872.78, 122,343.04 and 61,476.56

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Solution

The fourth proportional to 81,872.78, 122,343.04 and 61,476.56 is: 91,864.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,872.78 : 122,343.04 = 61,476.56 : x
  2. Step 2: Convert to fraction form
    81,872.78/122,343.04 = 61,476.56/x
  3. Step 3: Cross multiply
    81,872.78x = 122,343.04 × 61,476.56
  4. Step 4: Simplify right side
    81,872.78x = 7,521,229,239.14
  5. Step 5: Solve for x
    x = 7,521,229,239.14/81,872.78
  6. Step 6: Final answer
    x = 91,864.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.