Home / 100,817.21-139,126.69-55,494.22

Finding the Fourth Proportional to 100,817.21, 139,126.69 and 55,494.22

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Solution

The fourth proportional to 100,817.21, 139,126.69 and 55,494.22 is: 76,581.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,817.21 : 139,126.69 = 55,494.22 : x
  2. Step 2: Convert to fraction form
    100,817.21/139,126.69 = 55,494.22/x
  3. Step 3: Cross multiply
    100,817.21x = 139,126.69 × 55,494.22
  4. Step 4: Simplify right side
    100,817.21x = 7,720,726,169.63
  5. Step 5: Solve for x
    x = 7,720,726,169.63/100,817.21
  6. Step 6: Final answer
    x = 76,581.43

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1.5x scale

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.