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Finding the Fourth Proportional to 272,586.35, 408,895.92 and 85,597.85

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Solution

The fourth proportional to 272,586.35, 408,895.92 and 85,597.85 is: 128,401.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,586.35 : 408,895.92 = 85,597.85 : x
  2. Step 2: Convert to fraction form
    272,586.35/408,895.92 = 85,597.85/x
  3. Step 3: Cross multiply
    272,586.35x = 408,895.92 × 85,597.85
  4. Step 4: Simplify right side
    272,586.35x = 35,000,609,581.29
  5. Step 5: Solve for x
    x = 35,000,609,581.29/272,586.35
  6. Step 6: Final answer
    x = 128,401.92

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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.