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Finding the Fourth Proportional to 139,230.54, 192,138.30 and 75,568.38

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Solution

The fourth proportional to 139,230.54, 192,138.30 and 75,568.38 is: 104,284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,230.54 : 192,138.30 = 75,568.38 : x
  2. Step 2: Convert to fraction form
    139,230.54/192,138.30 = 75,568.38/x
  3. Step 3: Cross multiply
    139,230.54x = 192,138.30 × 75,568.38
  4. Step 4: Simplify right side
    139,230.54x = 14,519,580,066.95
  5. Step 5: Solve for x
    x = 14,519,580,066.95/139,230.54
  6. Step 6: Final answer
    x = 104,284.45

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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.