Home / 81,938.78-122,886.30-22,777.69

Finding the Fourth Proportional to 81,938.78, 122,886.30 and 22,777.69

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Solution

The fourth proportional to 81,938.78, 122,886.30 and 22,777.69 is: 34,160.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,938.78 : 122,886.30 = 22,777.69 : x
  2. Step 2: Convert to fraction form
    81,938.78/122,886.30 = 22,777.69/x
  3. Step 3: Cross multiply
    81,938.78x = 122,886.30 × 22,777.69
  4. Step 4: Simplify right side
    81,938.78x = 2,799,066,046.65
  5. Step 5: Solve for x
    x = 2,799,066,046.65/81,938.78
  6. Step 6: Final answer
    x = 34,160.46

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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.