Home / 101,102.05-139,519.50-55,781.95

Finding the Fourth Proportional to 101,102.05, 139,519.50 and 55,781.95

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Solution

The fourth proportional to 101,102.05, 139,519.50 and 55,781.95 is: 76,978.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,102.05 : 139,519.50 = 55,781.95 : x
  2. Step 2: Convert to fraction form
    101,102.05/139,519.50 = 55,781.95/x
  3. Step 3: Cross multiply
    101,102.05x = 139,519.50 × 55,781.95
  4. Step 4: Simplify right side
    101,102.05x = 7,782,669,773.03
  5. Step 5: Solve for x
    x = 7,782,669,773.03/101,102.05
  6. Step 6: Final answer
    x = 76,978.36

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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.