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Finding the Fourth Proportional to 170,411.70, 255,617.55 and 81,838.20

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Solution

The fourth proportional to 170,411.70, 255,617.55 and 81,838.20 is: 122,757.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,411.70 : 255,617.55 = 81,838.20 : x
  2. Step 2: Convert to fraction form
    170,411.70/255,617.55 = 81,838.20/x
  3. Step 3: Cross multiply
    170,411.70x = 255,617.55 × 81,838.20
  4. Step 4: Simplify right side
    170,411.70x = 20,919,280,180.41
  5. Step 5: Solve for x
    x = 20,919,280,180.41/170,411.70
  6. Step 6: Final answer
    x = 122,757.30

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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.