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Finding the Fourth Proportional to 272,543.51, 408,784.12 and 72,879.47

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Solution

The fourth proportional to 272,543.51, 408,784.12 and 72,879.47 is: 109,310.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,543.51 : 408,784.12 = 72,879.47 : x
  2. Step 2: Convert to fraction form
    272,543.51/408,784.12 = 72,879.47/x
  3. Step 3: Cross multiply
    272,543.51x = 408,784.12 × 72,879.47
  4. Step 4: Simplify right side
    272,543.51x = 29,791,969,005.86
  5. Step 5: Solve for x
    x = 29,791,969,005.86/272,543.51
  6. Step 6: Final answer
    x = 109,310.87

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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.