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Finding the Fourth Proportional to 68,865.20, 103,322.10 and 66,435.20

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Solution

The fourth proportional to 68,865.20, 103,322.10 and 66,435.20 is: 99,676.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,865.20 : 103,322.10 = 66,435.20 : x
  2. Step 2: Convert to fraction form
    68,865.20/103,322.10 = 66,435.20/x
  3. Step 3: Cross multiply
    68,865.20x = 103,322.10 × 66,435.20
  4. Step 4: Simplify right side
    68,865.20x = 6,864,224,377.92
  5. Step 5: Solve for x
    x = 6,864,224,377.92/68,865.20
  6. Step 6: Final answer
    x = 99,676.24

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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.