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Finding the Fourth Proportional to 71,380.47, 107,062.20 and 18,794.06

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Solution

The fourth proportional to 71,380.47, 107,062.20 and 18,794.06 is: 28,188.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,380.47 : 107,062.20 = 18,794.06 : x
  2. Step 2: Convert to fraction form
    71,380.47/107,062.20 = 18,794.06/x
  3. Step 3: Cross multiply
    71,380.47x = 107,062.20 × 18,794.06
  4. Step 4: Simplify right side
    71,380.47x = 2,012,132,875.22
  5. Step 5: Solve for x
    x = 2,012,132,875.22/71,380.47
  6. Step 6: Final answer
    x = 28,188.84

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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.