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Finding the Fourth Proportional to 100,885.80, 139,216.83 and 55,555.22

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Solution

The fourth proportional to 100,885.80, 139,216.83 and 55,555.22 is: 76,663.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,885.80 : 139,216.83 = 55,555.22 : x
  2. Step 2: Convert to fraction form
    100,885.80/139,216.83 = 55,555.22/x
  3. Step 3: Cross multiply
    100,885.80x = 139,216.83 × 55,555.22
  4. Step 4: Simplify right side
    100,885.80x = 7,734,220,974.97
  5. Step 5: Solve for x
    x = 7,734,220,974.97/100,885.80
  6. Step 6: Final answer
    x = 76,663.12

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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.