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Finding the Fourth Proportional to 68,965.20, 103,472.10 and 66,535.20

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Solution

The fourth proportional to 68,965.20, 103,472.10 and 66,535.20 is: 99,826.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,965.20 : 103,472.10 = 66,535.20 : x
  2. Step 2: Convert to fraction form
    68,965.20/103,472.10 = 66,535.20/x
  3. Step 3: Cross multiply
    68,965.20x = 103,472.10 × 66,535.20
  4. Step 4: Simplify right side
    68,965.20x = 6,884,536,867.92
  5. Step 5: Solve for x
    x = 6,884,536,867.92/68,965.20
  6. Step 6: Final answer
    x = 99,826.24

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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.