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Finding the Fourth Proportional to 170,153.63, 255,388.30 and 85,972.94

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Solution

The fourth proportional to 170,153.63, 255,388.30 and 85,972.94 is: 129,039.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,153.63 : 255,388.30 = 85,972.94 : x
  2. Step 2: Convert to fraction form
    170,153.63/255,388.30 = 85,972.94/x
  3. Step 3: Cross multiply
    170,153.63x = 255,388.30 × 85,972.94
  4. Step 4: Simplify right side
    170,153.63x = 21,956,481,500.73
  5. Step 5: Solve for x
    x = 21,956,481,500.73/170,153.63
  6. Step 6: Final answer
    x = 129,039.16

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1.5x scale

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.