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Finding the Fourth Proportional to 55,219.60, 82,915.80 and 42,086.80

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Solution

The fourth proportional to 55,219.60, 82,915.80 and 42,086.80 is: 63,196.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,219.60 : 82,915.80 = 42,086.80 : x
  2. Step 2: Convert to fraction form
    55,219.60/82,915.80 = 42,086.80/x
  3. Step 3: Cross multiply
    55,219.60x = 82,915.80 × 42,086.80
  4. Step 4: Simplify right side
    55,219.60x = 3,489,660,691.44
  5. Step 5: Solve for x
    x = 3,489,660,691.44/55,219.60
  6. Step 6: Final answer
    x = 63,196.05

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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.