Home / 55,149.20-76,103.10-31,278.09

Finding the Fourth Proportional to 55,149.20, 76,103.10 and 31,278.09

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Solution

The fourth proportional to 55,149.20, 76,103.10 and 31,278.09 is: 43,162.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,149.20 : 76,103.10 = 31,278.09 : x
  2. Step 2: Convert to fraction form
    55,149.20/76,103.10 = 31,278.09/x
  3. Step 3: Cross multiply
    55,149.20x = 76,103.10 × 31,278.09
  4. Step 4: Simplify right side
    55,149.20x = 2,380,359,611.08
  5. Step 5: Solve for x
    x = 2,380,359,611.08/55,149.20
  6. Step 6: Final answer
    x = 43,162.18

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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.