Home / 80,107.31-120,179.14-42,647.65

Finding the Fourth Proportional to 80,107.31, 120,179.14 and 42,647.65

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Solution

The fourth proportional to 80,107.31, 120,179.14 and 42,647.65 is: 63,981.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,107.31 : 120,179.14 = 42,647.65 : x
  2. Step 2: Convert to fraction form
    80,107.31/120,179.14 = 42,647.65/x
  3. Step 3: Cross multiply
    80,107.31x = 120,179.14 × 42,647.65
  4. Step 4: Simplify right side
    80,107.31x = 5,125,357,492.95
  5. Step 5: Solve for x
    x = 5,125,357,492.95/80,107.31
  6. Step 6: Final answer
    x = 63,981.14

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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.