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Finding the Fourth Proportional to 139,898.44, 193,050.61 and 78,654.07

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Solution

The fourth proportional to 139,898.44, 193,050.61 and 78,654.07 is: 108,537.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,898.44 : 193,050.61 = 78,654.07 : x
  2. Step 2: Convert to fraction form
    139,898.44/193,050.61 = 78,654.07/x
  3. Step 3: Cross multiply
    139,898.44x = 193,050.61 × 78,654.07
  4. Step 4: Simplify right side
    139,898.44x = 15,184,214,833.96
  5. Step 5: Solve for x
    x = 15,184,214,833.96/139,898.44
  6. Step 6: Final answer
    x = 108,537.42

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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.