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Finding the Fourth Proportional to 71,379.21, 107,060.54 and 18,792.80

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Solution

The fourth proportional to 71,379.21, 107,060.54 and 18,792.80 is: 28,187.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.21 : 107,060.54 = 18,792.80 : x
  2. Step 2: Convert to fraction form
    71,379.21/107,060.54 = 18,792.80/x
  3. Step 3: Cross multiply
    71,379.21x = 107,060.54 × 18,792.80
  4. Step 4: Simplify right side
    71,379.21x = 2,011,966,686.85
  5. Step 5: Solve for x
    x = 2,011,966,686.85/71,379.21
  6. Step 6: Final answer
    x = 28,187.01

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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.