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Finding the Fourth Proportional to 272,357.56, 408,536.42 and 72,678.68

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Solution

The fourth proportional to 272,357.56, 408,536.42 and 72,678.68 is: 109,018.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,357.56 : 408,536.42 = 72,678.68 : x
  2. Step 2: Convert to fraction form
    272,357.56/408,536.42 = 72,678.68/x
  3. Step 3: Cross multiply
    272,357.56x = 408,536.42 × 72,678.68
  4. Step 4: Simplify right side
    272,357.56x = 29,691,887,737.53
  5. Step 5: Solve for x
    x = 29,691,887,737.53/272,357.56
  6. Step 6: Final answer
    x = 109,018.04

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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.