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Finding the Fourth Proportional to 68,675.60, 102,840.60 and 54,851.60

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Solution

The fourth proportional to 68,675.60, 102,840.60 and 54,851.60 is: 82,139.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,675.60 : 102,840.60 = 54,851.60 : x
  2. Step 2: Convert to fraction form
    68,675.60/102,840.60 = 54,851.60/x
  3. Step 3: Cross multiply
    68,675.60x = 102,840.60 × 54,851.60
  4. Step 4: Simplify right side
    68,675.60x = 5,640,971,454.96
  5. Step 5: Solve for x
    x = 5,640,971,454.96/68,675.60
  6. Step 6: Final answer
    x = 82,139.38

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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.