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Finding the Fourth Proportional to 272,504.75, 408,771.71 and 85,530.83

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Solution

The fourth proportional to 272,504.75, 408,771.71 and 85,530.83 is: 128,300.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,504.75 : 408,771.71 = 85,530.83 : x
  2. Step 2: Convert to fraction form
    272,504.75/408,771.71 = 85,530.83/x
  3. Step 3: Cross multiply
    272,504.75x = 408,771.71 × 85,530.83
  4. Step 4: Simplify right side
    272,504.75x = 34,962,583,209.17
  5. Step 5: Solve for x
    x = 34,962,583,209.17/272,504.75
  6. Step 6: Final answer
    x = 128,300.82

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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.