Home / 100,743.84-139,022.11-55,418.95

Finding the Fourth Proportional to 100,743.84, 139,022.11 and 55,418.95

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Solution

The fourth proportional to 100,743.84, 139,022.11 and 55,418.95 is: 76,475.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,743.84 : 139,022.11 = 55,418.95 : x
  2. Step 2: Convert to fraction form
    100,743.84/139,022.11 = 55,418.95/x
  3. Step 3: Cross multiply
    100,743.84x = 139,022.11 × 55,418.95
  4. Step 4: Simplify right side
    100,743.84x = 7,704,459,370.90
  5. Step 5: Solve for x
    x = 7,704,459,370.90/100,743.84
  6. Step 6: Final answer
    x = 76,475.74

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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.