Home / 138,997.69-191,815.56-77,743.80

Finding the Fourth Proportional to 138,997.69, 191,815.56 and 77,743.80

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Solution

The fourth proportional to 138,997.69, 191,815.56 and 77,743.80 is: 107,285.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,997.69 : 191,815.56 = 77,743.80 : x
  2. Step 2: Convert to fraction form
    138,997.69/191,815.56 = 77,743.80/x
  3. Step 3: Cross multiply
    138,997.69x = 191,815.56 × 77,743.80
  4. Step 4: Simplify right side
    138,997.69x = 14,912,470,533.53
  5. Step 5: Solve for x
    x = 14,912,470,533.53/138,997.69
  6. Step 6: Final answer
    x = 107,285.75

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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.