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Finding the Fourth Proportional to 272,744.88, 409,133.72 and 85,756.38

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Solution

The fourth proportional to 272,744.88, 409,133.72 and 85,756.38 is: 128,639.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,744.88 : 409,133.72 = 85,756.38 : x
  2. Step 2: Convert to fraction form
    272,744.88/409,133.72 = 85,756.38/x
  3. Step 3: Cross multiply
    272,744.88x = 409,133.72 × 85,756.38
  4. Step 4: Simplify right side
    272,744.88x = 35,085,826,763.13
  5. Step 5: Solve for x
    x = 35,085,826,763.13/272,744.88
  6. Step 6: Final answer
    x = 128,639.73

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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.