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Finding the Fourth Proportional to 79,687.74, 119,530.80 and 20,523.18

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Solution

The fourth proportional to 79,687.74, 119,530.80 and 20,523.18 is: 30,784.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,687.74 : 119,530.80 = 20,523.18 : x
  2. Step 2: Convert to fraction form
    79,687.74/119,530.80 = 20,523.18/x
  3. Step 3: Cross multiply
    79,687.74x = 119,530.80 × 20,523.18
  4. Step 4: Simplify right side
    79,687.74x = 2,453,152,123.94
  5. Step 5: Solve for x
    x = 2,453,152,123.94/79,687.74
  6. Step 6: Final answer
    x = 30,784.56

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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.