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Finding the Fourth Proportional to 272,143.92, 408,214.88 and 72,464.32

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Solution

The fourth proportional to 272,143.92, 408,214.88 and 72,464.32 is: 108,696.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,143.92 : 408,214.88 = 72,464.32 : x
  2. Step 2: Convert to fraction form
    272,143.92/408,214.88 = 72,464.32/x
  3. Step 3: Cross multiply
    272,143.92x = 408,214.88 × 72,464.32
  4. Step 4: Simplify right side
    272,143.92x = 29,581,013,693.08
  5. Step 5: Solve for x
    x = 29,581,013,693.08/272,143.92
  6. Step 6: Final answer
    x = 108,696.21

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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.