Home / 101,103.09-139,524.93-55,781.66

Finding the Fourth Proportional to 101,103.09, 139,524.93 and 55,781.66

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Solution

The fourth proportional to 101,103.09, 139,524.93 and 55,781.66 is: 76,980.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,103.09 : 139,524.93 = 55,781.66 : x
  2. Step 2: Convert to fraction form
    101,103.09/139,524.93 = 55,781.66/x
  3. Step 3: Cross multiply
    101,103.09x = 139,524.93 × 55,781.66
  4. Step 4: Simplify right side
    101,103.09x = 7,782,932,555.60
  5. Step 5: Solve for x
    x = 7,782,932,555.60/101,103.09
  6. Step 6: Final answer
    x = 76,980.17

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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.