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Finding the Fourth Proportional to 68,259.64, 102,391.08 and 18,339.80

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Solution

The fourth proportional to 68,259.64, 102,391.08 and 18,339.80 is: 27,510.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,259.64 : 102,391.08 = 18,339.80 : x
  2. Step 2: Convert to fraction form
    68,259.64/102,391.08 = 18,339.80/x
  3. Step 3: Cross multiply
    68,259.64x = 102,391.08 × 18,339.80
  4. Step 4: Simplify right side
    68,259.64x = 1,877,831,928.98
  5. Step 5: Solve for x
    x = 1,877,831,928.98/68,259.64
  6. Step 6: Final answer
    x = 27,510.14

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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.