Home / 80,651.10-120,979.35-21,492.75

Finding the Fourth Proportional to 80,651.10, 120,979.35 and 21,492.75

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Solution

The fourth proportional to 80,651.10, 120,979.35 and 21,492.75 is: 32,239.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,651.10 : 120,979.35 = 21,492.75 : x
  2. Step 2: Convert to fraction form
    80,651.10/120,979.35 = 21,492.75/x
  3. Step 3: Cross multiply
    80,651.10x = 120,979.35 × 21,492.75
  4. Step 4: Simplify right side
    80,651.10x = 2,600,178,924.71
  5. Step 5: Solve for x
    x = 2,600,178,924.71/80,651.10
  6. Step 6: Final answer
    x = 32,239.84

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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.