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Finding the Fourth Proportional to 139,169.05, 192,032.88 and 77,912.07

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Solution

The fourth proportional to 139,169.05, 192,032.88 and 77,912.07 is: 107,507.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,169.05 : 192,032.88 = 77,912.07 : x
  2. Step 2: Convert to fraction form
    139,169.05/192,032.88 = 77,912.07/x
  3. Step 3: Cross multiply
    139,169.05x = 192,032.88 × 77,912.07
  4. Step 4: Simplify right side
    139,169.05x = 14,961,678,614.82
  5. Step 5: Solve for x
    x = 14,961,678,614.82/139,169.05
  6. Step 6: Final answer
    x = 107,507.22

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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.