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Finding the Fourth Proportional to 170,954.70, 256,479.45 and 71,161.90

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Solution

The fourth proportional to 170,954.70, 256,479.45 and 71,161.90 is: 106,762.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,954.70 : 256,479.45 = 71,161.90 : x
  2. Step 2: Convert to fraction form
    170,954.70/256,479.45 = 71,161.90/x
  3. Step 3: Cross multiply
    170,954.70x = 256,479.45 × 71,161.90
  4. Step 4: Simplify right side
    170,954.70x = 18,251,564,972.96
  5. Step 5: Solve for x
    x = 18,251,564,972.96/170,954.70
  6. Step 6: Final answer
    x = 106,762.58

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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.