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Finding the Fourth Proportional to 272,359.89, 408,605.46 and 85,371.39

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Solution

The fourth proportional to 272,359.89, 408,605.46 and 85,371.39 is: 128,077.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,359.89 : 408,605.46 = 85,371.39 : x
  2. Step 2: Convert to fraction form
    272,359.89/408,605.46 = 85,371.39/x
  3. Step 3: Cross multiply
    272,359.89x = 408,605.46 × 85,371.39
  4. Step 4: Simplify right side
    272,359.89x = 34,883,216,081.79
  5. Step 5: Solve for x
    x = 34,883,216,081.79/272,359.89
  6. Step 6: Final answer
    x = 128,077.66

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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.