Home / 80,421.22-120,508.81-42,986.62

Finding the Fourth Proportional to 80,421.22, 120,508.81 and 42,986.62

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Solution

The fourth proportional to 80,421.22, 120,508.81 and 42,986.62 is: 64,414.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,421.22 : 120,508.81 = 42,986.62 : x
  2. Step 2: Convert to fraction form
    80,421.22/120,508.81 = 42,986.62/x
  3. Step 3: Cross multiply
    80,421.22x = 120,508.81 × 42,986.62
  4. Step 4: Simplify right side
    80,421.22x = 5,180,266,422.12
  5. Step 5: Solve for x
    x = 5,180,266,422.12/80,421.22
  6. Step 6: Final answer
    x = 64,414.17

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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.