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Finding the Fourth Proportional to 121,626.88, 182,474.88 and 85,753.60

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Solution

The fourth proportional to 121,626.88, 182,474.88 and 85,753.60 is: 128,654.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,626.88 : 182,474.88 = 85,753.60 : x
  2. Step 2: Convert to fraction form
    121,626.88/182,474.88 = 85,753.60/x
  3. Step 3: Cross multiply
    121,626.88x = 182,474.88 × 85,753.60
  4. Step 4: Simplify right side
    121,626.88x = 15,647,877,869.57
  5. Step 5: Solve for x
    x = 15,647,877,869.57/121,626.88
  6. Step 6: Final answer
    x = 128,654.77

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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.