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Finding the Fourth Proportional to 139,742.76, 192,812.22 and 79,299.72

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Solution

The fourth proportional to 139,742.76, 192,812.22 and 79,299.72 is: 109,415.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,742.76 : 192,812.22 = 79,299.72 : x
  2. Step 2: Convert to fraction form
    139,742.76/192,812.22 = 79,299.72/x
  3. Step 3: Cross multiply
    139,742.76x = 192,812.22 × 79,299.72
  4. Step 4: Simplify right side
    139,742.76x = 15,289,955,058.58
  5. Step 5: Solve for x
    x = 15,289,955,058.58/139,742.76
  6. Step 6: Final answer
    x = 109,415.01

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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.