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Finding the Fourth Proportional to 139,223.29, 192,128.21 and 75,561.08

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Solution

The fourth proportional to 139,223.29, 192,128.21 and 75,561.08 is: 104,274.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,223.29 : 192,128.21 = 75,561.08 : x
  2. Step 2: Convert to fraction form
    139,223.29/192,128.21 = 75,561.08/x
  3. Step 3: Cross multiply
    139,223.29x = 192,128.21 × 75,561.08
  4. Step 4: Simplify right side
    139,223.29x = 14,517,415,046.07
  5. Step 5: Solve for x
    x = 14,517,415,046.07/139,223.29
  6. Step 6: Final answer
    x = 104,274.33

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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.