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Finding the Fourth Proportional to 178,866.72, 246,531.60 and 122,179.68

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Solution

The fourth proportional to 178,866.72, 246,531.60 and 122,179.68 is: 168,399.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,866.72 : 246,531.60 = 122,179.68 : x
  2. Step 2: Convert to fraction form
    178,866.72/246,531.60 = 122,179.68/x
  3. Step 3: Cross multiply
    178,866.72x = 246,531.60 × 122,179.68
  4. Step 4: Simplify right side
    178,866.72x = 30,121,151,997.89
  5. Step 5: Solve for x
    x = 30,121,151,997.89/178,866.72
  6. Step 6: Final answer
    x = 168,399.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.