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Finding the Fourth Proportional to 68,686.80, 103,043.64 and 29,243.60

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Solution

The fourth proportional to 68,686.80, 103,043.64 and 29,243.60 is: 43,871.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,686.80 : 103,043.64 = 29,243.60 : x
  2. Step 2: Convert to fraction form
    68,686.80/103,043.64 = 29,243.60/x
  3. Step 3: Cross multiply
    68,686.80x = 103,043.64 × 29,243.60
  4. Step 4: Simplify right side
    68,686.80x = 3,013,366,990.70
  5. Step 5: Solve for x
    x = 3,013,366,990.70/68,686.80
  6. Step 6: Final answer
    x = 43,871.12

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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.