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Finding the Fourth Proportional to 139,563.63, 192,593.70 and 79,139.79

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Solution

The fourth proportional to 139,563.63, 192,593.70 and 79,139.79 is: 109,210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,563.63 : 192,593.70 = 79,139.79 : x
  2. Step 2: Convert to fraction form
    139,563.63/192,593.70 = 79,139.79/x
  3. Step 3: Cross multiply
    139,563.63x = 192,593.70 × 79,139.79
  4. Step 4: Simplify right side
    139,563.63x = 15,241,824,973.32
  5. Step 5: Solve for x
    x = 15,241,824,973.32/139,563.63
  6. Step 6: Final answer
    x = 109,210.58

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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.