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Finding the Fourth Proportional to 71,432.66, 107,138.46 and 18,845.84

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Solution

The fourth proportional to 71,432.66, 107,138.46 and 18,845.84 is: 28,265.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,432.66 : 107,138.46 = 18,845.84 : x
  2. Step 2: Convert to fraction form
    71,432.66/107,138.46 = 18,845.84/x
  3. Step 3: Cross multiply
    71,432.66x = 107,138.46 × 18,845.84
  4. Step 4: Simplify right side
    71,432.66x = 2,019,114,275.01
  5. Step 5: Solve for x
    x = 2,019,114,275.01/71,432.66
  6. Step 6: Final answer
    x = 28,265.98

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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.