Home / 100,909.26-139,255.70-55,588.85

Finding the Fourth Proportional to 100,909.26, 139,255.70 and 55,588.85

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Solution

The fourth proportional to 100,909.26, 139,255.70 and 55,588.85 is: 76,713.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,909.26 : 139,255.70 = 55,588.85 : x
  2. Step 2: Convert to fraction form
    100,909.26/139,255.70 = 55,588.85/x
  3. Step 3: Cross multiply
    100,909.26x = 139,255.70 × 55,588.85
  4. Step 4: Simplify right side
    100,909.26x = 7,741,064,218.95
  5. Step 5: Solve for x
    x = 7,741,064,218.95/100,909.26
  6. Step 6: Final answer
    x = 76,713.12

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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.