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Finding the Fourth Proportional to 272,367.53, 408,616.91 and 85,379.03

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Solution

The fourth proportional to 272,367.53, 408,616.91 and 85,379.03 is: 128,089.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,367.53 : 408,616.91 = 85,379.03 : x
  2. Step 2: Convert to fraction form
    272,367.53/408,616.91 = 85,379.03/x
  3. Step 3: Cross multiply
    272,367.53x = 408,616.91 × 85,379.03
  4. Step 4: Simplify right side
    272,367.53x = 34,887,314,990.50
  5. Step 5: Solve for x
    x = 34,887,314,990.50/272,367.53
  6. Step 6: Final answer
    x = 128,089.11

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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.