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Finding the Fourth Proportional to 68,357.21, 102,535.20 and 21,610.10

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Solution

The fourth proportional to 68,357.21, 102,535.20 and 21,610.10 is: 32,414.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,357.21 : 102,535.20 = 21,610.10 : x
  2. Step 2: Convert to fraction form
    68,357.21/102,535.20 = 21,610.10/x
  3. Step 3: Cross multiply
    68,357.21x = 102,535.20 × 21,610.10
  4. Step 4: Simplify right side
    68,357.21x = 2,215,795,925.52
  5. Step 5: Solve for x
    x = 2,215,795,925.52/68,357.21
  6. Step 6: Final answer
    x = 32,414.96

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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.