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Finding the Fourth Proportional to 272,365.88, 408,614.48 and 85,377.38

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Solution

The fourth proportional to 272,365.88, 408,614.48 and 85,377.38 is: 128,086.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,365.88 : 408,614.48 = 85,377.38 : x
  2. Step 2: Convert to fraction form
    272,365.88/408,614.48 = 85,377.38/x
  3. Step 3: Cross multiply
    272,365.88x = 408,614.48 × 85,377.38
  4. Step 4: Simplify right side
    272,365.88x = 34,886,433,305.58
  5. Step 5: Solve for x
    x = 34,886,433,305.58/272,365.88
  6. Step 6: Final answer
    x = 128,086.65

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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.