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Finding the Fourth Proportional to 78,800.70, 118,287.45 and 43,722.30

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Solution

The fourth proportional to 78,800.70, 118,287.45 and 43,722.30 is: 65,631.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,800.70 : 118,287.45 = 43,722.30 : x
  2. Step 2: Convert to fraction form
    78,800.70/118,287.45 = 43,722.30/x
  3. Step 3: Cross multiply
    78,800.70x = 118,287.45 × 43,722.30
  4. Step 4: Simplify right side
    78,800.70x = 5,171,799,375.14
  5. Step 5: Solve for x
    x = 5,171,799,375.14/78,800.70
  6. Step 6: Final answer
    x = 65,631.39

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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.