Home / 80,418.40-120,616.44-56,329.76

Finding the Fourth Proportional to 80,418.40, 120,616.44 and 56,329.76

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Solution

The fourth proportional to 80,418.40, 120,616.44 and 56,329.76 is: 84,486.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,418.40 : 120,616.44 = 56,329.76 : x
  2. Step 2: Convert to fraction form
    80,418.40/120,616.44 = 56,329.76/x
  3. Step 3: Cross multiply
    80,418.40x = 120,616.44 × 56,329.76
  4. Step 4: Simplify right side
    80,418.40x = 6,794,295,117.25
  5. Step 5: Solve for x
    x = 6,794,295,117.25/80,418.40
  6. Step 6: Final answer
    x = 84,486.82

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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.