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Finding the Fourth Proportional to 76,660.80, 114,991.20 and 57,998.40

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Solution

The fourth proportional to 76,660.80, 114,991.20 and 57,998.40 is: 86,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,660.80 : 114,991.20 = 57,998.40 : x
  2. Step 2: Convert to fraction form
    76,660.80/114,991.20 = 57,998.40/x
  3. Step 3: Cross multiply
    76,660.80x = 114,991.20 × 57,998.40
  4. Step 4: Simplify right side
    76,660.80x = 6,669,305,614.08
  5. Step 5: Solve for x
    x = 6,669,305,614.08/76,660.80
  6. Step 6: Final answer
    x = 86,997.60

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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.