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Finding the Fourth Proportional to 68,359.60, 102,539.40 and 41,978.80

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Solution

The fourth proportional to 68,359.60, 102,539.40 and 41,978.80 is: 62,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,359.60 : 102,539.40 = 41,978.80 : x
  2. Step 2: Convert to fraction form
    68,359.60/102,539.40 = 41,978.80/x
  3. Step 3: Cross multiply
    68,359.60x = 102,539.40 × 41,978.80
  4. Step 4: Simplify right side
    68,359.60x = 4,304,480,964.72
  5. Step 5: Solve for x
    x = 4,304,480,964.72/68,359.60
  6. Step 6: Final answer
    x = 62,968.20

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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.