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Finding the Fourth Proportional to 80,799.30, 121,254.30 and 28,208.80

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Solution

The fourth proportional to 80,799.30, 121,254.30 and 28,208.80 is: 42,332.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,799.30 : 121,254.30 = 28,208.80 : x
  2. Step 2: Convert to fraction form
    80,799.30/121,254.30 = 28,208.80/x
  3. Step 3: Cross multiply
    80,799.30x = 121,254.30 × 28,208.80
  4. Step 4: Simplify right side
    80,799.30x = 3,420,438,297.84
  5. Step 5: Solve for x
    x = 3,420,438,297.84/80,799.30
  6. Step 6: Final answer
    x = 42,332.52

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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.