Home / 80,212.12-120,315.69-38,122.51

Finding the Fourth Proportional to 80,212.12, 120,315.69 and 38,122.51

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Solution

The fourth proportional to 80,212.12, 120,315.69 and 38,122.51 is: 57,182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,212.12 : 120,315.69 = 38,122.51 : x
  2. Step 2: Convert to fraction form
    80,212.12/120,315.69 = 38,122.51/x
  3. Step 3: Cross multiply
    80,212.12x = 120,315.69 × 38,122.51
  4. Step 4: Simplify right side
    80,212.12x = 4,586,736,095.18
  5. Step 5: Solve for x
    x = 4,586,736,095.18/80,212.12
  6. Step 6: Final answer
    x = 57,182.58

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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.