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Finding the Fourth Proportional to 170,766.60, 256,222.80 and 81,974.40

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Solution

The fourth proportional to 170,766.60, 256,222.80 and 81,974.40 is: 122,996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,766.60 : 256,222.80 = 81,974.40 : x
  2. Step 2: Convert to fraction form
    170,766.60/256,222.80 = 81,974.40/x
  3. Step 3: Cross multiply
    170,766.60x = 256,222.80 × 81,974.40
  4. Step 4: Simplify right side
    170,766.60x = 21,003,710,296.32
  5. Step 5: Solve for x
    x = 21,003,710,296.32/170,766.60
  6. Step 6: Final answer
    x = 122,996.59

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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.