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Finding the Fourth Proportional to 139,618.32, 192,678.11 and 75,958.39

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Solution

The fourth proportional to 139,618.32, 192,678.11 and 75,958.39 is: 104,825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,618.32 : 192,678.11 = 75,958.39 : x
  2. Step 2: Convert to fraction form
    139,618.32/192,678.11 = 75,958.39/x
  3. Step 3: Cross multiply
    139,618.32x = 192,678.11 × 75,958.39
  4. Step 4: Simplify right side
    139,618.32x = 14,635,519,023.84
  5. Step 5: Solve for x
    x = 14,635,519,023.84/139,618.32
  6. Step 6: Final answer
    x = 104,825.21

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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.