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Finding the Fourth Proportional to 80,775.29, 121,154.29 and 28,185.77

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Solution

The fourth proportional to 80,775.29, 121,154.29 and 28,185.77 is: 42,275.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,775.29 : 121,154.29 = 28,185.77 : x
  2. Step 2: Convert to fraction form
    80,775.29/121,154.29 = 28,185.77/x
  3. Step 3: Cross multiply
    80,775.29x = 121,154.29 × 28,185.77
  4. Step 4: Simplify right side
    80,775.29x = 3,414,826,952.45
  5. Step 5: Solve for x
    x = 3,414,826,952.45/80,775.29
  6. Step 6: Final answer
    x = 42,275.64

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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.