Home / 80,789.79-121,240.04-28,199.27

Finding the Fourth Proportional to 80,789.79, 121,240.04 and 28,199.27

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Solution

The fourth proportional to 80,789.79, 121,240.04 and 28,199.27 is: 42,318.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,789.79 : 121,240.04 = 28,199.27 : x
  2. Step 2: Convert to fraction form
    80,789.79/121,240.04 = 28,199.27/x
  3. Step 3: Cross multiply
    80,789.79x = 121,240.04 × 28,199.27
  4. Step 4: Simplify right side
    80,789.79x = 3,418,880,784.87
  5. Step 5: Solve for x
    x = 3,418,880,784.87/80,789.79
  6. Step 6: Final answer
    x = 42,318.23

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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.