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Finding the Fourth Proportional to 139,567.81, 192,560.12 and 79,133.71

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Solution

The fourth proportional to 139,567.81, 192,560.12 and 79,133.71 is: 109,179.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,567.81 : 192,560.12 = 79,133.71 : x
  2. Step 2: Convert to fraction form
    139,567.81/192,560.12 = 79,133.71/x
  3. Step 3: Cross multiply
    139,567.81x = 192,560.12 × 79,133.71
  4. Step 4: Simplify right side
    139,567.81x = 15,237,995,730.84
  5. Step 5: Solve for x
    x = 15,237,995,730.84/139,567.81
  6. Step 6: Final answer
    x = 109,179.88

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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.