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Finding the Fourth Proportional to 170,951.70, 256,427.55 and 82,378.20

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Solution

The fourth proportional to 170,951.70, 256,427.55 and 82,378.20 is: 123,567.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,951.70 : 256,427.55 = 82,378.20 : x
  2. Step 2: Convert to fraction form
    170,951.70/256,427.55 = 82,378.20/x
  3. Step 3: Cross multiply
    170,951.70x = 256,427.55 × 82,378.20
  4. Step 4: Simplify right side
    170,951.70x = 21,124,039,999.41
  5. Step 5: Solve for x
    x = 21,124,039,999.41/170,951.70
  6. Step 6: Final answer
    x = 123,567.30

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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.