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Finding the Fourth Proportional to 139,083.60, 191,933.68 and 75,420.62

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Solution

The fourth proportional to 139,083.60, 191,933.68 and 75,420.62 is: 104,079.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,083.60 : 191,933.68 = 75,420.62 : x
  2. Step 2: Convert to fraction form
    139,083.60/191,933.68 = 75,420.62/x
  3. Step 3: Cross multiply
    139,083.60x = 191,933.68 × 75,420.62
  4. Step 4: Simplify right side
    139,083.60x = 14,475,757,144.48
  5. Step 5: Solve for x
    x = 14,475,757,144.48/139,083.60
  6. Step 6: Final answer
    x = 104,079.54

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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.