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Finding the Fourth Proportional to 99,287.20, 148,930.80 and 81,776.80

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Solution

The fourth proportional to 99,287.20, 148,930.80 and 81,776.80 is: 122,665.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,287.20 : 148,930.80 = 81,776.80 : x
  2. Step 2: Convert to fraction form
    99,287.20/148,930.80 = 81,776.80/x
  3. Step 3: Cross multiply
    99,287.20x = 148,930.80 × 81,776.80
  4. Step 4: Simplify right side
    99,287.20x = 12,179,084,245.44
  5. Step 5: Solve for x
    x = 12,179,084,245.44/99,287.20
  6. Step 6: Final answer
    x = 122,665.20

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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.