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Finding the Fourth Proportional to 139,874.80, 193,027.25 and 76,212.60

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Solution

The fourth proportional to 139,874.80, 193,027.25 and 76,212.60 is: 105,173.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,874.80 : 193,027.25 = 76,212.60 : x
  2. Step 2: Convert to fraction form
    139,874.80/193,027.25 = 76,212.60/x
  3. Step 3: Cross multiply
    139,874.80x = 193,027.25 × 76,212.60
  4. Step 4: Simplify right side
    139,874.80x = 14,711,108,060.03
  5. Step 5: Solve for x
    x = 14,711,108,060.03/139,874.80
  6. Step 6: Final answer
    x = 105,173.40

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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.