Home / 80,355.78-120,557.97-30,451.14

Finding the Fourth Proportional to 80,355.78, 120,557.97 and 30,451.14

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Solution

The fourth proportional to 80,355.78, 120,557.97 and 30,451.14 is: 45,685.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,355.78 : 120,557.97 = 30,451.14 : x
  2. Step 2: Convert to fraction form
    80,355.78/120,557.97 = 30,451.14/x
  3. Step 3: Cross multiply
    80,355.78x = 120,557.97 × 30,451.14
  4. Step 4: Simplify right side
    80,355.78x = 3,671,127,622.59
  5. Step 5: Solve for x
    x = 3,671,127,622.59/80,355.78
  6. Step 6: Final answer
    x = 45,685.92

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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.