Home / 76,755.38-115,123.64-20,599.90

Finding the Fourth Proportional to 76,755.38, 115,123.64 and 20,599.90

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Solution

The fourth proportional to 76,755.38, 115,123.64 and 20,599.90 is: 30,897.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,755.38 : 115,123.64 = 20,599.90 : x
  2. Step 2: Convert to fraction form
    76,755.38/115,123.64 = 20,599.90/x
  3. Step 3: Cross multiply
    76,755.38x = 115,123.64 × 20,599.90
  4. Step 4: Simplify right side
    76,755.38x = 2,371,535,471.64
  5. Step 5: Solve for x
    x = 2,371,535,471.64/76,755.38
  6. Step 6: Final answer
    x = 30,897.32

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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.