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Finding the Fourth Proportional to 139,233.71, 192,142.70 and 75,571.50

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Solution

The fourth proportional to 139,233.71, 192,142.70 and 75,571.50 is: 104,288.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,233.71 : 192,142.70 = 75,571.50 : x
  2. Step 2: Convert to fraction form
    139,233.71/192,142.70 = 75,571.50/x
  3. Step 3: Cross multiply
    139,233.71x = 192,142.70 × 75,571.50
  4. Step 4: Simplify right side
    139,233.71x = 14,520,511,675.19
  5. Step 5: Solve for x
    x = 14,520,511,675.19/139,233.71
  6. Step 6: Final answer
    x = 104,288.77

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1.5x scale

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.