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Finding the Fourth Proportional to 178,712.20, 246,678.20 and 115,050

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Solution

The fourth proportional to 178,712.20, 246,678.20 and 115,050 is: 158,804.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,712.20 : 246,678.20 = 115,050 : x
  2. Step 2: Convert to fraction form
    178,712.20/246,678.20 = 115,050/x
  3. Step 3: Cross multiply
    178,712.20x = 246,678.20 × 115,050
  4. Step 4: Simplify right side
    178,712.20x = 28,380,326,910
  5. Step 5: Solve for x
    x = 28,380,326,910/178,712.20
  6. Step 6: Final answer
    x = 158,804.64

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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.