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Finding the Fourth Proportional to 139,745, 192,862.68 and 79,331.96

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Solution

The fourth proportional to 139,745, 192,862.68 and 79,331.96 is: 109,486.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,745 : 192,862.68 = 79,331.96 : x
  2. Step 2: Convert to fraction form
    139,745/192,862.68 = 79,331.96/x
  3. Step 3: Cross multiply
    139,745x = 192,862.68 × 79,331.96
  4. Step 4: Simplify right side
    139,745x = 15,300,174,415.25
  5. Step 5: Solve for x
    x = 15,300,174,415.25/139,745
  6. Step 6: Final answer
    x = 109,486.38

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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.