Home / 99,288.20-148,932.30-81,777.80

Finding the Fourth Proportional to 99,288.20, 148,932.30 and 81,777.80

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Solution

The fourth proportional to 99,288.20, 148,932.30 and 81,777.80 is: 122,666.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,288.20 : 148,932.30 = 81,777.80 : x
  2. Step 2: Convert to fraction form
    99,288.20/148,932.30 = 81,777.80/x
  3. Step 3: Cross multiply
    99,288.20x = 148,932.30 × 81,777.80
  4. Step 4: Simplify right side
    99,288.20x = 12,179,355,842.94
  5. Step 5: Solve for x
    x = 12,179,355,842.94/99,288.20
  6. Step 6: Final answer
    x = 122,666.70

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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.