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Finding the Fourth Proportional to 79,521.80, 119,279.96 and 20,357.98

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Solution

The fourth proportional to 79,521.80, 119,279.96 and 20,357.98 is: 30,536.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,521.80 : 119,279.96 = 20,357.98 : x
  2. Step 2: Convert to fraction form
    79,521.80/119,279.96 = 20,357.98/x
  3. Step 3: Cross multiply
    79,521.80x = 119,279.96 × 20,357.98
  4. Step 4: Simplify right side
    79,521.80x = 2,428,299,040.08
  5. Step 5: Solve for x
    x = 2,428,299,040.08/79,521.80
  6. Step 6: Final answer
    x = 30,536.27

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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.