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Finding the Fourth Proportional to 68,567.40, 102,846.78 and 21,853.80

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Solution

The fourth proportional to 68,567.40, 102,846.78 and 21,853.80 is: 32,779.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,567.40 : 102,846.78 = 21,853.80 : x
  2. Step 2: Convert to fraction form
    68,567.40/102,846.78 = 21,853.80/x
  3. Step 3: Cross multiply
    68,567.40x = 102,846.78 × 21,853.80
  4. Step 4: Simplify right side
    68,567.40x = 2,247,592,960.76
  5. Step 5: Solve for x
    x = 2,247,592,960.76/68,567.40
  6. Step 6: Final answer
    x = 32,779.32

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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.