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Finding the Fourth Proportional to 68,163.50, 102,248.90 and 21,420.02

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Solution

The fourth proportional to 68,163.50, 102,248.90 and 21,420.02 is: 32,131.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,163.50 : 102,248.90 = 21,420.02 : x
  2. Step 2: Convert to fraction form
    68,163.50/102,248.90 = 21,420.02/x
  3. Step 3: Cross multiply
    68,163.50x = 102,248.90 × 21,420.02
  4. Step 4: Simplify right side
    68,163.50x = 2,190,173,482.98
  5. Step 5: Solve for x
    x = 2,190,173,482.98/68,163.50
  6. Step 6: Final answer
    x = 32,131.18

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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.