Home / 409,237.80-613,923.90-128,687.40

Finding the Fourth Proportional to 409,237.80, 613,923.90 and 128,687.40

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Solution

The fourth proportional to 409,237.80, 613,923.90 and 128,687.40 is: 193,052.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,237.80 : 613,923.90 = 128,687.40 : x
  2. Step 2: Convert to fraction form
    409,237.80/613,923.90 = 128,687.40/x
  3. Step 3: Cross multiply
    409,237.80x = 613,923.90 × 128,687.40
  4. Step 4: Simplify right side
    409,237.80x = 79,004,270,488.86
  5. Step 5: Solve for x
    x = 79,004,270,488.86/409,237.80
  6. Step 6: Final answer
    x = 193,052.23

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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.