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Finding the Fourth Proportional to 68,442.63, 102,673.83 and 21,061.80

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Solution

The fourth proportional to 68,442.63, 102,673.83 and 21,061.80 is: 31,595.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,442.63 : 102,673.83 = 21,061.80 : x
  2. Step 2: Convert to fraction form
    68,442.63/102,673.83 = 21,061.80/x
  3. Step 3: Cross multiply
    68,442.63x = 102,673.83 × 21,061.80
  4. Step 4: Simplify right side
    68,442.63x = 2,162,495,672.69
  5. Step 5: Solve for x
    x = 2,162,495,672.69/68,442.63
  6. Step 6: Final answer
    x = 31,595.74

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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.