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Finding the Fourth Proportional to 78,763.72, 118,200.98 and 71,234.92

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Solution

The fourth proportional to 78,763.72, 118,200.98 and 71,234.92 is: 106,902.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,763.72 : 118,200.98 = 71,234.92 : x
  2. Step 2: Convert to fraction form
    78,763.72/118,200.98 = 71,234.92/x
  3. Step 3: Cross multiply
    78,763.72x = 118,200.98 × 71,234.92
  4. Step 4: Simplify right side
    78,763.72x = 8,420,037,354.22
  5. Step 5: Solve for x
    x = 8,420,037,354.22/78,763.72
  6. Step 6: Final answer
    x = 106,902.48

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1.5x scale

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.