Home / 55,278.75-76,286.78-30,128.25

Finding the Fourth Proportional to 55,278.75, 76,286.78 and 30,128.25

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Solution

The fourth proportional to 55,278.75, 76,286.78 and 30,128.25 is: 41,578.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,278.75 : 76,286.78 = 30,128.25 : x
  2. Step 2: Convert to fraction form
    55,278.75/76,286.78 = 30,128.25/x
  3. Step 3: Cross multiply
    55,278.75x = 76,286.78 × 30,128.25
  4. Step 4: Simplify right side
    55,278.75x = 2,298,387,028.89
  5. Step 5: Solve for x
    x = 2,298,387,028.89/55,278.75
  6. Step 6: Final answer
    x = 41,578.13

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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.