Home / 80,651.36-120,898.20-36,289.28

Finding the Fourth Proportional to 80,651.36, 120,898.20 and 36,289.28

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Solution

The fourth proportional to 80,651.36, 120,898.20 and 36,289.28 is: 54,398.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,651.36 : 120,898.20 = 36,289.28 : x
  2. Step 2: Convert to fraction form
    80,651.36/120,898.20 = 36,289.28/x
  3. Step 3: Cross multiply
    80,651.36x = 120,898.20 × 36,289.28
  4. Step 4: Simplify right side
    80,651.36x = 4,387,308,631.30
  5. Step 5: Solve for x
    x = 4,387,308,631.30/80,651.36
  6. Step 6: Final answer
    x = 54,398.45

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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.