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Finding the Fourth Proportional to 79,281.63, 109,408.68 and 43,470.90

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Solution

The fourth proportional to 79,281.63, 109,408.68 and 43,470.90 is: 59,989.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,281.63 : 109,408.68 = 43,470.90 : x
  2. Step 2: Convert to fraction form
    79,281.63/109,408.68 = 43,470.90/x
  3. Step 3: Cross multiply
    79,281.63x = 109,408.68 × 43,470.90
  4. Step 4: Simplify right side
    79,281.63x = 4,756,093,787.41
  5. Step 5: Solve for x
    x = 4,756,093,787.41/79,281.63
  6. Step 6: Final answer
    x = 59,989.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.