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Finding the Fourth Proportional to 68,535.70, 102,803.55 and 65,911.30

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Solution

The fourth proportional to 68,535.70, 102,803.55 and 65,911.30 is: 98,866.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,535.70 : 102,803.55 = 65,911.30 : x
  2. Step 2: Convert to fraction form
    68,535.70/102,803.55 = 65,911.30/x
  3. Step 3: Cross multiply
    68,535.70x = 102,803.55 × 65,911.30
  4. Step 4: Simplify right side
    68,535.70x = 6,775,915,625.12
  5. Step 5: Solve for x
    x = 6,775,915,625.12/68,535.70
  6. Step 6: Final answer
    x = 98,866.95

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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.