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Finding the Fourth Proportional to 79,874.90, 119,874.31 and 30,000.36

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Solution

The fourth proportional to 79,874.90, 119,874.31 and 30,000.36 is: 45,023.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,874.90 : 119,874.31 = 30,000.36 : x
  2. Step 2: Convert to fraction form
    79,874.90/119,874.31 = 30,000.36/x
  3. Step 3: Cross multiply
    79,874.90x = 119,874.31 × 30,000.36
  4. Step 4: Simplify right side
    79,874.90x = 3,596,272,454.75
  5. Step 5: Solve for x
    x = 3,596,272,454.75/79,874.90
  6. Step 6: Final answer
    x = 45,023.81

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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.