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Finding the Fourth Proportional to 170,634.87, 255,744.75 and 120,729.36

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Solution

The fourth proportional to 170,634.87, 255,744.75 and 120,729.36 is: 180,947.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,634.87 : 255,744.75 = 120,729.36 : x
  2. Step 2: Convert to fraction form
    170,634.87/255,744.75 = 120,729.36/x
  3. Step 3: Cross multiply
    170,634.87x = 255,744.75 × 120,729.36
  4. Step 4: Simplify right side
    170,634.87x = 30,875,899,990.86
  5. Step 5: Solve for x
    x = 30,875,899,990.86/170,634.87
  6. Step 6: Final answer
    x = 180,947.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.