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Finding the Fourth Proportional to 78,793.70, 118,276.95 and 43,715.30

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Solution

The fourth proportional to 78,793.70, 118,276.95 and 43,715.30 is: 65,620.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,793.70 : 118,276.95 = 43,715.30 : x
  2. Step 2: Convert to fraction form
    78,793.70/118,276.95 = 43,715.30/x
  3. Step 3: Cross multiply
    78,793.70x = 118,276.95 × 43,715.30
  4. Step 4: Simplify right side
    78,793.70x = 5,170,512,352.34
  5. Step 5: Solve for x
    x = 5,170,512,352.34/78,793.70
  6. Step 6: Final answer
    x = 65,620.89

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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.