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Finding the Fourth Proportional to 68,543.70, 102,815.55 and 65,919.30

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Solution

The fourth proportional to 68,543.70, 102,815.55 and 65,919.30 is: 98,878.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,543.70 : 102,815.55 = 65,919.30 : x
  2. Step 2: Convert to fraction form
    68,543.70/102,815.55 = 65,919.30/x
  3. Step 3: Cross multiply
    68,543.70x = 102,815.55 × 65,919.30
  4. Step 4: Simplify right side
    68,543.70x = 6,777,529,085.12
  5. Step 5: Solve for x
    x = 6,777,529,085.12/68,543.70
  6. Step 6: Final answer
    x = 98,878.95

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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.