Home / 55,128.80-76,045.64-40,003.88

Finding the Fourth Proportional to 55,128.80, 76,045.64 and 40,003.88

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Solution

The fourth proportional to 55,128.80, 76,045.64 and 40,003.88 is: 55,182.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,128.80 : 76,045.64 = 40,003.88 : x
  2. Step 2: Convert to fraction form
    55,128.80/76,045.64 = 40,003.88/x
  3. Step 3: Cross multiply
    55,128.80x = 76,045.64 × 40,003.88
  4. Step 4: Simplify right side
    55,128.80x = 3,042,120,076.84
  5. Step 5: Solve for x
    x = 3,042,120,076.84/55,128.80
  6. Step 6: Final answer
    x = 55,182.05

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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.