Home / 272,806.08-409,170.24-85,812.72

Finding the Fourth Proportional to 272,806.08, 409,170.24 and 85,812.72

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Solution

The fourth proportional to 272,806.08, 409,170.24 and 85,812.72 is: 128,706.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,806.08 : 409,170.24 = 85,812.72 : x
  2. Step 2: Convert to fraction form
    272,806.08/409,170.24 = 85,812.72/x
  3. Step 3: Cross multiply
    272,806.08x = 409,170.24 × 85,812.72
  4. Step 4: Simplify right side
    272,806.08x = 35,112,011,237.45
  5. Step 5: Solve for x
    x = 35,112,011,237.45/272,806.08
  6. Step 6: Final answer
    x = 128,706.85

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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.