Home / 77,986.90-116,979.30-18,822.04

Finding the Fourth Proportional to 77,986.90, 116,979.30 and 18,822.04

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Solution

The fourth proportional to 77,986.90, 116,979.30 and 18,822.04 is: 28,232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,986.90 : 116,979.30 = 18,822.04 : x
  2. Step 2: Convert to fraction form
    77,986.90/116,979.30 = 18,822.04/x
  3. Step 3: Cross multiply
    77,986.90x = 116,979.30 × 18,822.04
  4. Step 4: Simplify right side
    77,986.90x = 2,201,789,063.77
  5. Step 5: Solve for x
    x = 2,201,789,063.77/77,986.90
  6. Step 6: Final answer
    x = 28,232.81

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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.