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Finding the Fourth Proportional to 68,446.20, 102,669.30 and 42,065.40

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Solution

The fourth proportional to 68,446.20, 102,669.30 and 42,065.40 is: 63,098.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,446.20 : 102,669.30 = 42,065.40 : x
  2. Step 2: Convert to fraction form
    68,446.20/102,669.30 = 42,065.40/x
  3. Step 3: Cross multiply
    68,446.20x = 102,669.30 × 42,065.40
  4. Step 4: Simplify right side
    68,446.20x = 4,318,825,172.22
  5. Step 5: Solve for x
    x = 4,318,825,172.22/68,446.20
  6. Step 6: Final answer
    x = 63,098.10

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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.