Home / 72,778.41-109,167.61-20,187.89

Finding the Fourth Proportional to 72,778.41, 109,167.61 and 20,187.89

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Solution

The fourth proportional to 72,778.41, 109,167.61 and 20,187.89 is: 30,281.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,778.41 : 109,167.61 = 20,187.89 : x
  2. Step 2: Convert to fraction form
    72,778.41/109,167.61 = 20,187.89/x
  3. Step 3: Cross multiply
    72,778.41x = 109,167.61 × 20,187.89
  4. Step 4: Simplify right side
    72,778.41x = 2,203,863,702.24
  5. Step 5: Solve for x
    x = 2,203,863,702.24/72,778.41
  6. Step 6: Final answer
    x = 30,281.83

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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.