Home / 136,983.20-205,513.20-66,864.80

Finding the Fourth Proportional to 136,983.20, 205,513.20 and 66,864.80

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Solution

The fourth proportional to 136,983.20, 205,513.20 and 66,864.80 is: 100,315.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,983.20 : 205,513.20 = 66,864.80 : x
  2. Step 2: Convert to fraction form
    136,983.20/205,513.20 = 66,864.80/x
  3. Step 3: Cross multiply
    136,983.20x = 205,513.20 × 66,864.80
  4. Step 4: Simplify right side
    136,983.20x = 13,741,599,015.36
  5. Step 5: Solve for x
    x = 13,741,599,015.36/136,983.20
  6. Step 6: Final answer
    x = 100,315.94

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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.