Home / 80,724.72-121,021.47-28,171.11

Finding the Fourth Proportional to 80,724.72, 121,021.47 and 28,171.11

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Solution

The fourth proportional to 80,724.72, 121,021.47 and 28,171.11 is: 42,233.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,724.72 : 121,021.47 = 28,171.11 : x
  2. Step 2: Convert to fraction form
    80,724.72/121,021.47 = 28,171.11/x
  3. Step 3: Cross multiply
    80,724.72x = 121,021.47 × 28,171.11
  4. Step 4: Simplify right side
    80,724.72x = 3,409,309,703.20
  5. Step 5: Solve for x
    x = 3,409,309,703.20/80,724.72
  6. Step 6: Final answer
    x = 42,233.77

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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.