Home / 80,599.40-120,899.10-72,434.60

Finding the Fourth Proportional to 80,599.40, 120,899.10 and 72,434.60

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Solution

The fourth proportional to 80,599.40, 120,899.10 and 72,434.60 is: 108,651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,599.40 : 120,899.10 = 72,434.60 : x
  2. Step 2: Convert to fraction form
    80,599.40/120,899.10 = 72,434.60/x
  3. Step 3: Cross multiply
    80,599.40x = 120,899.10 × 72,434.60
  4. Step 4: Simplify right side
    80,599.40x = 8,757,277,948.86
  5. Step 5: Solve for x
    x = 8,757,277,948.86/80,599.40
  6. Step 6: Final answer
    x = 108,651.90

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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.