Home / 101,005.78-139,388.92-55,685.38

Finding the Fourth Proportional to 101,005.78, 139,388.92 and 55,685.38

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Solution

The fourth proportional to 101,005.78, 139,388.92 and 55,685.38 is: 76,846.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,005.78 : 139,388.92 = 55,685.38 : x
  2. Step 2: Convert to fraction form
    101,005.78/139,388.92 = 55,685.38/x
  3. Step 3: Cross multiply
    101,005.78x = 139,388.92 × 55,685.38
  4. Step 4: Simplify right side
    101,005.78x = 7,761,924,977.99
  5. Step 5: Solve for x
    x = 7,761,924,977.99/101,005.78
  6. Step 6: Final answer
    x = 76,846.34

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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.