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Finding the Fourth Proportional to 68,705.58, 102,978.45 and 56,246.70

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Solution

The fourth proportional to 68,705.58, 102,978.45 and 56,246.70 is: 84,304.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,705.58 : 102,978.45 = 56,246.70 : x
  2. Step 2: Convert to fraction form
    68,705.58/102,978.45 = 56,246.70/x
  3. Step 3: Cross multiply
    68,705.58x = 102,978.45 × 56,246.70
  4. Step 4: Simplify right side
    68,705.58x = 5,792,197,983.62
  5. Step 5: Solve for x
    x = 5,792,197,983.62/68,705.58
  6. Step 6: Final answer
    x = 84,304.62

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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.