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Finding the Fourth Proportional to 76,790.48, 115,177.93 and 20,623.29

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Solution

The fourth proportional to 76,790.48, 115,177.93 and 20,623.29 is: 30,932.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,790.48 : 115,177.93 = 20,623.29 : x
  2. Step 2: Convert to fraction form
    76,790.48/115,177.93 = 20,623.29/x
  3. Step 3: Cross multiply
    76,790.48x = 115,177.93 × 20,623.29
  4. Step 4: Simplify right side
    76,790.48x = 2,375,347,851.99
  5. Step 5: Solve for x
    x = 2,375,347,851.99/76,790.48
  6. Step 6: Final answer
    x = 30,932.84

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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.