Home / 100,860.18-139,185.90-55,537.22

Finding the Fourth Proportional to 100,860.18, 139,185.90 and 55,537.22

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Solution

The fourth proportional to 100,860.18, 139,185.90 and 55,537.22 is: 76,640.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,860.18 : 139,185.90 = 55,537.22 : x
  2. Step 2: Convert to fraction form
    100,860.18/139,185.90 = 55,537.22/x
  3. Step 3: Cross multiply
    100,860.18x = 139,185.90 × 55,537.22
  4. Step 4: Simplify right side
    100,860.18x = 7,729,997,949.20
  5. Step 5: Solve for x
    x = 7,729,997,949.20/100,860.18
  6. Step 6: Final answer
    x = 76,640.73

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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.