Home / 80,829.11-121,243.91-28,238.60

Finding the Fourth Proportional to 80,829.11, 121,243.91 and 28,238.60

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Solution

The fourth proportional to 80,829.11, 121,243.91 and 28,238.60 is: 42,357.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,829.11 : 121,243.91 = 28,238.60 : x
  2. Step 2: Convert to fraction form
    80,829.11/121,243.91 = 28,238.60/x
  3. Step 3: Cross multiply
    80,829.11x = 121,243.91 × 28,238.60
  4. Step 4: Simplify right side
    80,829.11x = 3,423,758,135.73
  5. Step 5: Solve for x
    x = 3,423,758,135.73/80,829.11
  6. Step 6: Final answer
    x = 42,357.98

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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.