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Finding the Fourth Proportional to 272,366.53, 408,615.41 and 85,378.03

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Solution

The fourth proportional to 272,366.53, 408,615.41 and 85,378.03 is: 128,087.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,366.53 : 408,615.41 = 85,378.03 : x
  2. Step 2: Convert to fraction form
    272,366.53/408,615.41 = 85,378.03/x
  3. Step 3: Cross multiply
    272,366.53x = 408,615.41 × 85,378.03
  4. Step 4: Simplify right side
    272,366.53x = 34,886,778,306.55
  5. Step 5: Solve for x
    x = 34,886,778,306.55/272,366.53
  6. Step 6: Final answer
    x = 128,087.61

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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.