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Finding the Fourth Proportional to 97,767.80, 146,829.90 and 85,520.60

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Solution

The fourth proportional to 97,767.80, 146,829.90 and 85,520.60 is: 128,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,767.80 : 146,829.90 = 85,520.60 : x
  2. Step 2: Convert to fraction form
    97,767.80/146,829.90 = 85,520.60/x
  3. Step 3: Cross multiply
    97,767.80x = 146,829.90 × 85,520.60
  4. Step 4: Simplify right side
    97,767.80x = 12,556,981,145.94
  5. Step 5: Solve for x
    x = 12,556,981,145.94/97,767.80
  6. Step 6: Final answer
    x = 128,436.78

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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.