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Finding the Fourth Proportional to 139,486.14, 192,489.20 and 75,822.56

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Solution

The fourth proportional to 139,486.14, 192,489.20 and 75,822.56 is: 104,634.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,486.14 : 192,489.20 = 75,822.56 : x
  2. Step 2: Convert to fraction form
    139,486.14/192,489.20 = 75,822.56/x
  3. Step 3: Cross multiply
    139,486.14x = 192,489.20 × 75,822.56
  4. Step 4: Simplify right side
    139,486.14x = 14,595,023,916.35
  5. Step 5: Solve for x
    x = 14,595,023,916.35/139,486.14
  6. Step 6: Final answer
    x = 104,634.22

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1.5x scale

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.