Home / 77,721.72-106,996.56-74,150.96

Finding the Fourth Proportional to 77,721.72, 106,996.56 and 74,150.96

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Solution

The fourth proportional to 77,721.72, 106,996.56 and 74,150.96 is: 102,080.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,721.72 : 106,996.56 = 74,150.96 : x
  2. Step 2: Convert to fraction form
    77,721.72/106,996.56 = 74,150.96/x
  3. Step 3: Cross multiply
    77,721.72x = 106,996.56 × 74,150.96
  4. Step 4: Simplify right side
    77,721.72x = 7,933,897,640.70
  5. Step 5: Solve for x
    x = 7,933,897,640.70/77,721.72
  6. Step 6: Final answer
    x = 102,080.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.