Home / 100,839.60-139,153.14-55,515.87

Finding the Fourth Proportional to 100,839.60, 139,153.14 and 55,515.87

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Solution

The fourth proportional to 100,839.60, 139,153.14 and 55,515.87 is: 76,608.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,839.60 : 139,153.14 = 55,515.87 : x
  2. Step 2: Convert to fraction form
    100,839.60/139,153.14 = 55,515.87/x
  3. Step 3: Cross multiply
    100,839.60x = 139,153.14 × 55,515.87
  4. Step 4: Simplify right side
    100,839.60x = 7,725,207,630.33
  5. Step 5: Solve for x
    x = 7,725,207,630.33/100,839.60
  6. Step 6: Final answer
    x = 76,608.87

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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.