Home / 80,979.12-111,759.84-45,181.56

Finding the Fourth Proportional to 80,979.12, 111,759.84 and 45,181.56

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Solution

The fourth proportional to 80,979.12, 111,759.84 and 45,181.56 is: 62,355.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,979.12 : 111,759.84 = 45,181.56 : x
  2. Step 2: Convert to fraction form
    80,979.12/111,759.84 = 45,181.56/x
  3. Step 3: Cross multiply
    80,979.12x = 111,759.84 × 45,181.56
  4. Step 4: Simplify right side
    80,979.12x = 5,049,483,916.55
  5. Step 5: Solve for x
    x = 5,049,483,916.55/80,979.12
  6. Step 6: Final answer
    x = 62,355.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.