Home / 67,177.22-100,780.40-20,428.88

Finding the Fourth Proportional to 67,177.22, 100,780.40 and 20,428.88

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Solution

The fourth proportional to 67,177.22, 100,780.40 and 20,428.88 is: 30,647.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,177.22 : 100,780.40 = 20,428.88 : x
  2. Step 2: Convert to fraction form
    67,177.22/100,780.40 = 20,428.88/x
  3. Step 3: Cross multiply
    67,177.22x = 100,780.40 × 20,428.88
  4. Step 4: Simplify right side
    67,177.22x = 2,058,830,245.12
  5. Step 5: Solve for x
    x = 2,058,830,245.12/67,177.22
  6. Step 6: Final answer
    x = 30,647.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.