Home / 80,795.16-121,221.88-28,212.40

Finding the Fourth Proportional to 80,795.16, 121,221.88 and 28,212.40

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Solution

The fourth proportional to 80,795.16, 121,221.88 and 28,212.40 is: 42,328.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,795.16 : 121,221.88 = 28,212.40 : x
  2. Step 2: Convert to fraction form
    80,795.16/121,221.88 = 28,212.40/x
  3. Step 3: Cross multiply
    80,795.16x = 121,221.88 × 28,212.40
  4. Step 4: Simplify right side
    80,795.16x = 3,419,960,167.31
  5. Step 5: Solve for x
    x = 3,419,960,167.31/80,795.16
  6. Step 6: Final answer
    x = 42,328.78

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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.