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Finding the Fourth Proportional to 68,611.80, 102,917.70 and 63,946.20

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Solution

The fourth proportional to 68,611.80, 102,917.70 and 63,946.20 is: 95,919.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,611.80 : 102,917.70 = 63,946.20 : x
  2. Step 2: Convert to fraction form
    68,611.80/102,917.70 = 63,946.20/x
  3. Step 3: Cross multiply
    68,611.80x = 102,917.70 × 63,946.20
  4. Step 4: Simplify right side
    68,611.80x = 6,581,195,827.74
  5. Step 5: Solve for x
    x = 6,581,195,827.74/68,611.80
  6. Step 6: Final answer
    x = 95,919.30

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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.