Home / 80,725.87-121,089.48-28,135.27

Finding the Fourth Proportional to 80,725.87, 121,089.48 and 28,135.27

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Solution

The fourth proportional to 80,725.87, 121,089.48 and 28,135.27 is: 42,203.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,725.87 : 121,089.48 = 28,135.27 : x
  2. Step 2: Convert to fraction form
    80,725.87/121,089.48 = 28,135.27/x
  3. Step 3: Cross multiply
    80,725.87x = 121,089.48 × 28,135.27
  4. Step 4: Simplify right side
    80,725.87x = 3,406,885,213.96
  5. Step 5: Solve for x
    x = 3,406,885,213.96/80,725.87
  6. Step 6: Final answer
    x = 42,203.14

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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.