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Finding the Fourth Proportional to 79,339, 119,008.94 and 20,174.71

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Solution

The fourth proportional to 79,339, 119,008.94 and 20,174.71 is: 30,262.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,339 : 119,008.94 = 20,174.71 : x
  2. Step 2: Convert to fraction form
    79,339/119,008.94 = 20,174.71/x
  3. Step 3: Cross multiply
    79,339x = 119,008.94 × 20,174.71
  4. Step 4: Simplify right side
    79,339x = 2,400,970,851.91
  5. Step 5: Solve for x
    x = 2,400,970,851.91/79,339
  6. Step 6: Final answer
    x = 30,262.18

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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.