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Finding the Fourth Proportional to 139,625.99, 192,687.20 and 79,200.71

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Solution

The fourth proportional to 139,625.99, 192,687.20 and 79,200.71 is: 109,298.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,625.99 : 192,687.20 = 79,200.71 : x
  2. Step 2: Convert to fraction form
    139,625.99/192,687.20 = 79,200.71/x
  3. Step 3: Cross multiply
    139,625.99x = 192,687.20 × 79,200.71
  4. Step 4: Simplify right side
    139,625.99x = 15,260,963,430.63
  5. Step 5: Solve for x
    x = 15,260,963,430.63/139,625.99
  6. Step 6: Final answer
    x = 109,298.87

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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.