Home / 82,063.62-123,212.07-78,305.22

Finding the Fourth Proportional to 82,063.62, 123,212.07 and 78,305.22

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Solution

The fourth proportional to 82,063.62, 123,212.07 and 78,305.22 is: 117,569.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,063.62 : 123,212.07 = 78,305.22 : x
  2. Step 2: Convert to fraction form
    82,063.62/123,212.07 = 78,305.22/x
  3. Step 3: Cross multiply
    82,063.62x = 123,212.07 × 78,305.22
  4. Step 4: Simplify right side
    82,063.62x = 9,648,148,248.01
  5. Step 5: Solve for x
    x = 9,648,148,248.01/82,063.62
  6. Step 6: Final answer
    x = 117,569.13

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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.