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Finding the Fourth Proportional to 68,278.60, 102,422.70 and 38,710.60

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Solution

The fourth proportional to 68,278.60, 102,422.70 and 38,710.60 is: 58,068.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,278.60 : 102,422.70 = 38,710.60 : x
  2. Step 2: Convert to fraction form
    68,278.60/102,422.70 = 38,710.60/x
  3. Step 3: Cross multiply
    68,278.60x = 102,422.70 × 38,710.60
  4. Step 4: Simplify right side
    68,278.60x = 3,964,844,170.62
  5. Step 5: Solve for x
    x = 3,964,844,170.62/68,278.60
  6. Step 6: Final answer
    x = 58,068.62

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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.