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Finding the Fourth Proportional to 272,543.76, 408,784.50 and 72,879.72

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Solution

The fourth proportional to 272,543.76, 408,784.50 and 72,879.72 is: 109,311.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,543.76 : 408,784.50 = 72,879.72 : x
  2. Step 2: Convert to fraction form
    272,543.76/408,784.50 = 72,879.72/x
  3. Step 3: Cross multiply
    272,543.76x = 408,784.50 × 72,879.72
  4. Step 4: Simplify right side
    272,543.76x = 29,792,098,696.18
  5. Step 5: Solve for x
    x = 29,792,098,696.18/272,543.76
  6. Step 6: Final answer
    x = 109,311.25

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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.