Home / 100,860.12-139,185.72-55,537.14

Finding the Fourth Proportional to 100,860.12, 139,185.72 and 55,537.14

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Solution

The fourth proportional to 100,860.12, 139,185.72 and 55,537.14 is: 76,640.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,860.12 : 139,185.72 = 55,537.14 : x
  2. Step 2: Convert to fraction form
    100,860.12/139,185.72 = 55,537.14/x
  3. Step 3: Cross multiply
    100,860.12x = 139,185.72 × 55,537.14
  4. Step 4: Simplify right side
    100,860.12x = 7,729,976,817.64
  5. Step 5: Solve for x
    x = 7,729,976,817.64/100,860.12
  6. Step 6: Final answer
    x = 76,640.57

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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.