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Finding the Fourth Proportional to 79,086.30, 118,630.80 and 29,140.70

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Solution

The fourth proportional to 79,086.30, 118,630.80 and 29,140.70 is: 43,711.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,086.30 : 118,630.80 = 29,140.70 : x
  2. Step 2: Convert to fraction form
    79,086.30/118,630.80 = 29,140.70/x
  3. Step 3: Cross multiply
    79,086.30x = 118,630.80 × 29,140.70
  4. Step 4: Simplify right side
    79,086.30x = 3,456,983,960.41
  5. Step 5: Solve for x
    x = 3,456,983,960.41/79,086.30
  6. Step 6: Final answer
    x = 43,711.54

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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.