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Finding the Fourth Proportional to 139,440.51, 192,429.12 and 75,778.30

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Solution

The fourth proportional to 139,440.51, 192,429.12 and 75,778.30 is: 104,574.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,440.51 : 192,429.12 = 75,778.30 : x
  2. Step 2: Convert to fraction form
    139,440.51/192,429.12 = 75,778.30/x
  3. Step 3: Cross multiply
    139,440.51x = 192,429.12 × 75,778.30
  4. Step 4: Simplify right side
    139,440.51x = 14,581,951,584.10
  5. Step 5: Solve for x
    x = 14,581,951,584.10/139,440.51
  6. Step 6: Final answer
    x = 104,574.71

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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.